Fix a test name, use Cluster instead of Channel

Cluster is correct terminology here as JGroups uses cluster name to
group members (nodes). Channel is a low-level concept and is used by a
node to connect to a cluster.

Change-Id: I025b844d5d298f879fa82ee748560e1e42ba7cd7
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/ConfigurationTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/ConfigurationTest.java
index b1d9fcc..145a0c9 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/ConfigurationTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/ConfigurationTest.java
@@ -153,7 +153,7 @@
   }
 
   @Test
-  public void testGetJGroupsChannel() throws Exception {
+  public void testGetJGroupsCluster() throws Exception {
     when(configMock.getEnum(PEER_INFO_SECTION, null, STRATEGY_KEY, DEFAULT_PEER_INFO_STRATEGY))
         .thenReturn(Configuration.PeerInfoStrategy.JGROUPS);
     initializeConfiguration();