Merge pull request #2814 from kamilszymanski/groovy_update

Upgrade to Groovy 2.4.11

core/pom.xml

@@ -41,7 +41,7 @@ THE SOFTWARE.
     <staplerFork>true</staplerFork>
     <stapler.version>1.250</stapler.version>
     <spring.version>2.5.6.SEC03</spring.version>
-    <groovy.version>2.4.8</groovy.version>
+    <groovy.version>2.4.11</groovy.version>
     <!-- TODO: Actually many issues are being filtered by src/findbugs/findbugs-excludes.xml -->
     <findbugs.failOnError>true</findbugs.failOnError>
   </properties>