Remove exclusions of dependency groovy

Closes gh-496

build.gradle

@@ -51,10 +51,7 @@ if (jointBuildGroovyJarProperty) {
         throw new GradleException("The groovy.jar system property points to ${jointBuildGroovyJar.absolutePath} which does not exist.")
     }
 } else {
-    groovyDependency = dependencies.create("org.apache.groovy:groovy:${groovyVersion}") {
-        exclude module:"commons-cli"
-        exclude module:"ant"
-    }
+    groovyDependency = dependencies.create("org.apache.groovy:groovy:${groovyVersion}")
 }
 
 version = grailsVersion