Must always use mockito-core instead of mockito-all 
Must always use mockito-core instead of mockito-all 

to prevent NoSuchMethodError: org.hamcrest.Matcher ...

Bug 7662 related
Change-Id: Ia34e4f4d0bf5a03cc311d69c3d9cfbe5362521ed
Signed-off-by: Michael Vorburger <4d49e7cce9f97fb576795ab27509f7ee282641f6@redhat.com>
opendaylight/yangtools,opendaylight/yangtools