now that 1.8.3 is out, going back to the official version

core/pom.xml

@@ -370,9 +370,9 @@ THE SOFTWARE.
       </exclusions>
     </dependency>
     <dependency>
-      <groupId>org.jenkins-ci.groovy</groupId>
+      <groupId>org.codehaus.groovy</groupId>
       <artifactId>groovy-all</artifactId>
-      <version>1.8.2-jenkins-1</version>
+      <version>1.8.3</version>
     </dependency>
     <dependency><!-- groovy shell uses this but it doesn't declare this dependency -->
       <groupId>jline</groupId>