revert previous change

build.gradle

@@ -5,6 +5,6 @@ repositories {
 }
 
 dependencies {
-    runtime "org.codehaus.groovy:groovy-all:2.4.8"
+    compile "org.codehaus.groovy:groovy-all:2.4.8"
     compile "com.sun.mail:javax.mail:1.5.3"
 }