Enable checkstyle rule to verify method names

Enabled checkstyle rule "MethodName" which checks
if method names adhere to a naming convention and
fixed the violations it found.

Change-Id: I87448a1fa857e78f33c42090d485bf21a8986ba7
diff --git a/src/test/java/net/onrc/onos/core/datastore/topology/KVTopologyTest.java b/src/test/java/net/onrc/onos/core/datastore/topology/KVTopologyTest.java
index d9c2478..ce647a4 100644
--- a/src/test/java/net/onrc/onos/core/datastore/topology/KVTopologyTest.java
+++ b/src/test/java/net/onrc/onos/core/datastore/topology/KVTopologyTest.java
@@ -34,7 +34,7 @@
 
 public class KVTopologyTest {
 
-    static final long VERSION_NONEXISTENT = DataStoreClient.getClient().VERSION_NONEXISTENT();
+    static final long VERSION_NONEXISTENT = DataStoreClient.getClient().getVersionNonexistant();
 
     private static final byte[] DEVICE2_MAC_SW2P2 = new byte[]{6, 5, 4, 3, 2, 1, 0};