ASTERIXDB-1113, Add ASF license header to AQL files

Change-Id: I462cb156b5cd8507ac0625d4a40863ec9383ce82
Reviewed-on: https://asterix-gerrit.ics.uci.edu/400
Reviewed-by: Ian Maxon <imaxon@apache.org>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
diff --git a/asterix-app/src/test/resources/optimizerts/queries/btree-index/btree-primary-27.aql b/asterix-app/src/test/resources/optimizerts/queries/btree-index/btree-primary-27.aql
index e9ccb87..57dc390 100644
--- a/asterix-app/src/test/resources/optimizerts/queries/btree-index/btree-primary-27.aql
+++ b/asterix-app/src/test/resources/optimizerts/queries/btree-index/btree-primary-27.aql
@@ -1,4 +1,22 @@
 /*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+/*
  *  Description     : BTree Index verification test
  *                  : This test is intended to verify that the primary BTree index is used 
  *                  : in the optimized query plan.