PRH:security vulnerabilities fix

*Removed unused libraries
*Fixed vulnerablities in connection
with clm scan
*Replaced AssertJ in tests verification
by using StepVerifier

Change-Id: I81c3ac54e5514735f0fca8150fcc218d96dc5ce3
Issue-ID: DCAEGEN2-770
Signed-off-by: wasala <przemyslaw.wasala@nokia.com>
18 files changed