[FIXED HUDSON-2191] upgraded to Groovy 1.5.7

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@13567 71c3de6d-444a-0410-be80-ed276b4c234a

core/pom.xml

@@ -381,7 +381,7 @@
     <dependency>
       <groupId>org.codehaus.groovy</groupId>
       <artifactId>groovy</artifactId>
-      <version>1.1-rc-2</version>
+      <version>1.5.7</version>
     </dependency>
     <dependency>
       <!--