Changed pom to allow import and running from eclipse

Currently when importing projects into eclipse you need to run 'mvn
eclipse:eclipse' on the command line to generate the poject files. This
means that when the pom changes you need to re-run the command on the
command line to reflect those changes in the project in eclipse.  This
commit allows the developer to import the project as an existing maven
project (can be shared using git after import) and then allows the
application to be run inside eclipse using the .launch file in
/dev-tools enabling easy debugging of the application within eclipse
without requiring a maven build.

CONTRIBUTING.md

@@ -74,6 +74,8 @@ Contributing to the Elasticsearch codebase
 
 Make sure you have [Maven](http://maven.apache.org) installed, as Elasticsearch uses it as its build system. Integration with IntelliJ and Eclipse should work out of the box. Eclipse users can automatically configure their IDE by running `mvn eclipse:eclipse` and then importing the project into their workspace: `File > Import > Existing project into workspace`.
 
+Elasticsearch also works perfectly with Eclipse's [http://www.eclipse.org/m2e/](m2e).  Once you've installed m2e you can import Elasticsearch as an `Existing Maven Project`.
+
 Please follow these formatting guidelines:
 
 * Java indent is 4 spaces

dev-tools/ElasticSearch.launch

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<launchConfiguration type="org.eclipse.jdt.launching.localJavaApplication">
+<listAttribute key="org.eclipse.debug.core.MAPPED_RESOURCE_PATHS">
+<listEntry value="/elasticsearch/src/main/java/org/elasticsearch/bootstrap/ElasticSearch.java"/>
+</listAttribute>
+<listAttribute key="org.eclipse.debug.core.MAPPED_RESOURCE_TYPES">
+<listEntry value="1"/>
+</listAttribute>
+<mapAttribute key="org.eclipse.debug.core.environmentVariables">
+<mapEntry key="ES_HOME" value="${target_home}"/>
+</mapAttribute>
+<stringAttribute key="org.eclipse.jdt.launching.CLASSPATH_PROVIDER" value="org.eclipse.m2e.launchconfig.classpathProvider"/>
+<stringAttribute key="org.eclipse.jdt.launching.MAIN_TYPE" value="org.elasticsearch.bootstrap.ElasticSearch"/>
+<stringAttribute key="org.eclipse.jdt.launching.PROJECT_ATTR" value="elasticsearch"/>
+<stringAttribute key="org.eclipse.jdt.launching.SOURCE_PATH_PROVIDER" value="org.eclipse.m2e.launchconfig.sourcepathProvider"/>
+<stringAttribute key="org.eclipse.jdt.launching.VM_ARGUMENTS" value="-Xms256m -Xmx1g -Xss256k -Djava.awt.headless=true -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=logs/heapdump.hprof -Delasticsearch -Des.foreground=yes -Djava.library.path=lib/sigar -ea"/>
+</launchConfiguration>

pom.xml

@@ -1016,7 +1016,50 @@
                                         </goals>
                                     </pluginExecutionFilter>
                                     <action>
-                                        <ignore/>
+                                        <execute />
+                                    </action>
+                                </pluginExecution>
+                                <!-- forbidden-apis plugin -->
+                                <pluginExecution>
+                                    <pluginExecutionFilter>
+                                        <groupId>de.thetaphi</groupId>
+                                        <artifactId>forbiddenapis</artifactId>
+                                        <versionRange>[1.0.0,)</versionRange>
+                                        <goals>
+                                            <goal>testCheck</goal>
+                                            <goal>check</goal>
+                                        </goals>
+                                    </pluginExecutionFilter>
+                                    <action>
+                                        <execute />
+                                    </action>
+                                </pluginExecution>
+                                <!-- exec-maven plugin -->
+                                <pluginExecution>
+                                    <pluginExecutionFilter>
+                                        <artifactId>exec-maven-plugin</artifactId>
+                                        <groupId>org.codehaus.mojo</groupId>
+                                        <versionRange>[1.0.0,)</versionRange>
+                                        <goals>
+                                            <goal>exec</goal>
+                                        </goals>
+                                    </pluginExecutionFilter>
+                                    <action>
+                                        <execute />
+                                    </action>
+                                </pluginExecution>
+                                <!-- copy-dependency plugin -->
+                                <pluginExecution>
+                                    <pluginExecutionFilter>
+                                        <groupId>org.apache.maven.plugins</groupId>
+                                        <artifactId>maven-enforcer-plugin</artifactId>
+                                        <versionRange>[1.0.0,)</versionRange>
+                                        <goals>
+                                            <goal>enforce</goal>
+                                        </goals>
+                                    </pluginExecutionFilter>
+                                    <action>
+                                        <execute />
                                     </action>
                                 </pluginExecution>
                             </pluginExecutions>