Added wildcard for transform.builder

Author: vamuzumd

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/watcher/transform/chain/ChainTransform.java

@@ -149,8 +149,8 @@ public Builder add(Transform... transforms) {
             return this;
         }
 
-        public Builder add(Transform.Builder<? extends Transform>... transforms) {
-            for (Transform.Builder<? extends Transform> transform: transforms) {
+        public Builder add(Transform.Builder<?>... transforms) {
+            for (Transform.Builder<?> transform: transforms) {
                 this.transforms.add(transform.build());
             }
             return this;

x-pack/plugin/watcher/src/main/java/org/elasticsearch/xpack/watcher/transform/TransformBuilders.java

@@ -32,7 +32,7 @@ public static ScriptTransform.Builder scriptTransform(Script script) {
         return ScriptTransform.builder(script);
     }
 
-    public static ChainTransform.Builder chainTransform(Transform.Builder... transforms) {
+    public static ChainTransform.Builder chainTransform(Transform.Builder<?>... transforms) {
         return ChainTransform.builder().add(transforms);
     }