Remove test case template for Elasticsearch 2

Because I'm having trouble making it work on recent JDKs.

It's so old we wouldn't consider bug reports like this anyway.

Author: yrodiere

pom.xml

@@ -13,7 +13,6 @@
     <module>orm/hibernate-orm-6</module>
     <module>envers/envers-5</module>
     <module>envers/envers-6</module>
-    <module>search/hibernate-search-5/elasticsearch-2</module>
     <module>search/hibernate-search-5/elasticsearch-5</module>
     <module>search/hibernate-search-5/lucene</module>
     <module>search/hibernate-search-6/orm-elasticsearch</module>

search/hibernate-search-5/elasticsearch-2/README.md

@@ -1,10 +1,9 @@
 # Hibernate Test Case Templates: Hibernate Search 5 with Elasticsearch 2
 
-This directory contains a test case template for Hibernate Search 5
+This directory used to contain a test case template for Hibernate Search 5
 backed with an Elasticsearch 2 cluster.
 
-You can run the integration tests:
+As Elasticsearch 2 is very old, we will no longer be accepting test cases like this,
+and the test case template has been removed.
 
-* either using the command line with: `mvn verify`: it will automatically launch an instance of Elasticsearch 2;
-* or directly from your IDE. In this case, you need to run an instance of Elasticsearch separately using:
-`mvn elasticsearch:run`.
+Refer to other templates to submit a reproducer.