Fixing copyright

Author: RachelTucker

src/ds3_library_exports.h

@@ -1,6 +1,17 @@
-//
-// Created by rachelt on 3/27/18.
-//
+/*
+ * ******************************************************************************
+ *   Copyright 2014-2017 Spectra Logic Corporation. All Rights Reserved.
+ *   Licensed under the Apache License, Version 2.0 (the "License"). You may not use
+ *   this file except in compliance with the License. A copy of the License is located at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   or in the "license" file accompanying this file.
+ *   This file 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.
+ * ****************************************************************************
+ */
 
 #ifndef DS3_LIBRARY_EXPORTS_H
 #define DS3_LIBRARY_EXPORTS_H