Add RAT headers

Author: msmygit

src/test/java/com/datastax/cdm/job/SplitPartitionsTest.java

@@ -1,3 +1,17 @@
+/*
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
 package com.datastax.cdm.job;
 
 import org.junit.jupiter.api.AfterEach;