Use RUNTIME_JAVA_HOME for test clusters

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/ClusterFormationTasks.groovy

@@ -700,8 +700,8 @@ class ClusterFormationTasks {
                 esJavaOpts.add('-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=8000')
             }
             node.env['ES_JAVA_OPTS'] = esJavaOpts.join(" ")
+            node.env['JAVA_HOME'] = node.getJavaHome()
 
-            //
             project.logger.info("Starting node in ${node.clusterName} distribution: ${node.config.distribution}")
         }
         return start

x-pack/plugin/sql/qa/single-node/src/test/java/org/elasticsearch/xpack/sql/qa/single_node/JdbcDocCsvSpecIT.java

@@ -30,9 +30,9 @@
  * gets reflected in the dataset structure.
  * The doc tests while redundant, try to be expressive first and foremost and sometimes
  * the dataset isn't exactly convenient.
- * 
+ *
  * Also looking around for the tests across the test files isn't trivial.
- * 
+ *
  * That's not to say the two cannot be merged however that felt like too much of an effort
  * at this stage and, to not keep things stalling, started with this approach.
  */
@@ -69,7 +69,7 @@ protected void assertResults(ResultSet expected, ResultSet elastic) throws SQLEx
         // uncomment this to printout the result set and create new CSV tests
         //
         //JdbcTestUtils.logLikeCLI(elastic, log);
-        JdbcAssert.assertResultSets(expected, elastic, log, true, false);
+        JdbcAssert.assertResultSets(expected, elastic, log, true, true);
     }
 
     @Override
@@ -87,4 +87,4 @@ protected final void doTest() throws Throwable {
             assertResults(expected, elasticResults);
         }
     }
-}
+}