Test: Fix package name

I created a test a few days ago and declared a package that doesn't line
up with the directory structure. Oops. I a little surprised nothing
complained. But this fixes it.

distribution/archives/integ-test-zip/src/test/java/org/elasticsearch/test/rest/NodeNameInLogsIT.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.unconfigurednodename;
+package org.elasticsearch.test.rest;
 
 import org.elasticsearch.common.logging.NodeNameInLogsIntegTestCase;