Checkstyle maven plugin check - md-sal

    -violations do not fail build
    -rules defined in yangtools/common/checkstyle-logging
	https://git.opendaylight.org/gerrit/#/c/7595/
	https://git.opendaylight.org/gerrit/#/c/7108/

Change-Id: I5cc6f833be8d6d6ad61d63d38a2ee0fffe2d75f6
Signed-off-by: Milos Fabian <milfabia@cisco.com>
Merge "Checkstyle maven plugin check - md-sal"