Stop shared CC cluster when it's not needed in tests

It consumes a lot of memory and causes single instance database
used by other tests to crash.

Author: lutovich

driver/src/test/java/org/neo4j/driver/v1/integration/CausalClusteringIT.java

@@ -19,6 +19,7 @@
 package org.neo4j.driver.v1.integration;
 
 import org.junit.After;
+import org.junit.AfterClass;
 import org.junit.Rule;
 import org.junit.Test;
 
@@ -96,6 +97,12 @@ public void tearDown()
         }
     }
 
+    @AfterClass
+    public static void stopSharedCluster()
+    {
+        ClusterRule.stopSharedCluster();
+    }
+
     @Test
     public void shouldExecuteReadAndWritesWhenDriverSuppliedWithAddressOfLeader() throws Exception
     {

driver/src/test/java/org/neo4j/driver/v1/stress/CausalClusteringStressIT.java

@@ -19,6 +19,7 @@
 package org.neo4j.driver.v1.stress;
 
 import org.junit.After;
+import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -57,6 +58,7 @@
 import org.neo4j.driver.v1.exceptions.SecurityException;
 import org.neo4j.driver.v1.types.Node;
 import org.neo4j.driver.v1.util.DaemonThreadFactory;
+import org.neo4j.driver.v1.util.cc.ClusterRule;
 import org.neo4j.driver.v1.util.cc.LocalOrRemoteClusterRule;
 
 import static java.util.Collections.newSetFromMap;
@@ -108,6 +110,12 @@ public void tearDown() throws Exception
         }
     }
 
+    @AfterClass
+    public static void stopSharedCluster()
+    {
+        ClusterRule.stopSharedCluster();
+    }
+
     @Test
     public void basicStressTest() throws Throwable
     {

driver/src/test/java/org/neo4j/driver/v1/util/cc/ClusterRule.java

@@ -52,6 +52,21 @@ public AuthToken getDefaultAuthToken()
         return AuthTokens.basic( "neo4j", PASSWORD );
     }
 
+    public static void stopSharedCluster()
+    {
+        if ( SharedCluster.exists() )
+        {
+            try
+            {
+                SharedCluster.stop();
+            }
+            finally
+            {
+                SharedCluster.remove();
+            }
+        }
+    }
+
     @Override
     protected void before() throws Throwable
     {