[HWKMETRICS-721] Update license headers for changed files.

(cherry picked from commit da7acb6)
Signed-off-by: Stefan Negrea <snegrea@redhat.com>

core/metrics-core-service/src/main/java/org/hawkular/metrics/core/service/DataAccess.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2016 Red Hat, Inc. and/or its affiliates
+ * Copyright 2014-2017 Red Hat, Inc. and/or its affiliates
  * and other contributors as indicated by the @author tags.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

core/metrics-core-service/src/main/java/org/hawkular/metrics/core/service/DataAccessImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2016 Red Hat, Inc. and/or its affiliates
+ * Copyright 2014-2017 Red Hat, Inc. and/or its affiliates
  * and other contributors as indicated by the @author tags.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

core/metrics-core-service/src/main/java/org/hawkular/metrics/core/service/MetricsServiceImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2016 Red Hat, Inc. and/or its affiliates
+ * Copyright 2014-2017 Red Hat, Inc. and/or its affiliates
  * and other contributors as indicated by the @author tags.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

core/metrics-core-service/src/test/java/org/hawkular/metrics/core/service/DelegatingDataAccess.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2016 Red Hat, Inc. and/or its affiliates
+ * Copyright 2014-2017 Red Hat, Inc. and/or its affiliates
  * and other contributors as indicated by the @author tags.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");