Modify command window title (windows)

When launching multiple nodes in MS Windows env, batch command window does not come by default with any title.

This patch add `Elasticsearch VERSION` as a title, where VERSION is the current elasticsearch version.

Same for `plugin.bat` and `service.bat`.

Closes #6336
Closes #6752

bin/elasticsearch.bat

@@ -68,6 +68,8 @@ set JAVA_OPTS=%JAVA_OPTS% -XX:+DisableExplicitGC
 set ES_CLASSPATH=%ES_CLASSPATH%;%ES_HOME%/lib/${project.build.finalName}.jar;%ES_HOME%/lib/*;%ES_HOME%/lib/sigar/*
 set ES_PARAMS=-Delasticsearch -Des-foreground=yes -Des.path.home="%ES_HOME%"
 
+TITLE Elasticsearch ${project.version}
+
 "%JAVA_HOME%\bin\java" %JAVA_OPTS% %ES_JAVA_OPTS% %ES_PARAMS% %* -cp "%ES_CLASSPATH%" "org.elasticsearch.bootstrap.Elasticsearch"
 goto finally
 

bin/plugin.bat

@@ -7,6 +7,7 @@ if NOT DEFINED JAVA_HOME goto err
 set SCRIPT_DIR=%~dp0
 for %%I in ("%SCRIPT_DIR%..") do set ES_HOME=%%~dpfI
 
+TITLE Elasticsearch Plugin Manager ${project.version}
 
 "%JAVA_HOME%\bin\java" %JAVA_OPTS% -Xmx64m -Xms16m -Des.path.home="%ES_HOME%" -cp "%ES_HOME%/lib/*;" "org.elasticsearch.plugins.PluginManager" %*
 goto finally

bin/service.bat

@@ -43,6 +43,8 @@ set SERVICE_ID=%1
 
 if "%LOG_OPTS%" == "" set LOG_OPTS=--LogPath "%LOG_DIR%" --LogPrefix "%SERVICE_ID%" --StdError auto --StdOutput auto
 
+TITLE Elasticsearch Service ${project.version}
+
 if /i %SERVICE_CMD% == install goto doInstall
 if /i %SERVICE_CMD% == remove goto doRemove
 if /i %SERVICE_CMD% == start goto doStart