HBASE-17326 Fix findbugs warning in BufferedMutatorParams Fix above and

the other hbase-server findbugs complaint about null-check
Addendum to fix complaint out of BMParams#clone. Added CN_IDIOM_NO_SUPER_CALL
handling.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/BufferedMutatorParams.java

@@ -132,6 +132,8 @@ public class BufferedMutatorParams implements Cloneable {
    *
    * @see java.lang.Object#clone()
    */
+  @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="CN_IDIOM_NO_SUPER_CALL",
+    justification="The clone below is complete")
   public BufferedMutatorParams clone() {
     BufferedMutatorParams clone = new BufferedMutatorParams(this.tableName);
     clone.writeBufferSize = this.writeBufferSize;