Remove checkstyle warnings in policy/engine

Remove checkstyle warnings in policy/engine ONAP-PDP

Change-Id: Ibbe2d8c549c1f0c3ac8456c4d2de4c7d349dd171
Issue-ID: POLICY-713
Signed-off-by: eramkve <ram.krishna.verma@ericsson.com>
17 files changed