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/pom.xml b/pom.xml
index 0274bb8..1de66ca 100644
--- a/pom.xml
+++ b/pom.xml
@@ -35,8 +35,8 @@
     <cobertura-maven-plugin.version>2.6</cobertura-maven-plugin.version>
     <!-- Following 2 findbugs version needs to be updated in sync to match the
          findbugs version used in findbugs-plugin -->
-    <findbugs.version>2.0.2</findbugs.version>
-    <findbugs-plugin.version>2.5.3</findbugs-plugin.version>
+    <findbugs.version>2.0.3</findbugs.version>
+    <findbugs-plugin.version>2.5.4</findbugs-plugin.version>
     <findbugs.effort>Max</findbugs.effort>
     <findbugs.excludeFilterFile>conf/findbugs/exclude.xml</findbugs.excludeFilterFile>
     <checkstyle-plugin.version>2.12</checkstyle-plugin.version>