updated years in licenses

indexer-core/src/main/java/org/opengroup/osdu/indexer/service/SchemaService.java

-// Copyright 2017-2019, Schlumberger
+// Copyright 2017-2020, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

indexer-core/src/main/java/org/opengroup/osdu/indexer/service/impl/SchemaProviderImpl.java

-// Copyright 2017-2019, Schlumberger
+// Copyright 2017-2020, Schlumberger
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.