Update findbugs versions.

- Update findbugs and maven plugins to 2.0.3 and 2.5.4.
- Fix for bugs detected by new version of findbugs

Note:
 If you see "dependencies could not be resolved" error,
 running "mvn clean verify -U" to force maven to check for new version in
 remote repository might resolve the issue.

Change-Id: I26661aaf5d791980b0ab161649022e5bb7cf045d
diff --git a/src/main/java/net/onrc/onos/apps/sdnip/SdnIp.java b/src/main/java/net/onrc/onos/apps/sdnip/SdnIp.java
index 4e4e6fa..5db148c 100644
--- a/src/main/java/net/onrc/onos/apps/sdnip/SdnIp.java
+++ b/src/main/java/net/onrc/onos/apps/sdnip/SdnIp.java
@@ -376,7 +376,7 @@
 
             Prefix p;
             try {
-                p = new Prefix(prefix1, Integer.valueOf(mask1));
+                p = new Prefix(prefix1, Integer.parseInt(mask1));
             } catch (NumberFormatException e) {
                 log.warn("Wrong mask format in RIB JSON: {}", mask1);
                 continue;