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/main/java/net/onrc/onos/apps/bgproute/PtreeNode.java b/src/main/java/net/onrc/onos/apps/bgproute/PtreeNode.java
index 4d0b470..76c37d9 100644
--- a/src/main/java/net/onrc/onos/apps/bgproute/PtreeNode.java
+++ b/src/main/java/net/onrc/onos/apps/bgproute/PtreeNode.java
@@ -26,7 +26,7 @@
         this.keyBits = keyBits;
         log.debug("inside Ptreenode constructor key {} bits {}", key, keyBits);
 
-        int octet = Ptree.bit_to_octet(keyBits);
+        int octet = Ptree.bitToOctet(keyBits);
         for (int i = 0; i < maxKeyOctet; i++) {
             if (i < octet) {
                 if (key != null) {