core: Remove useless main from GlusterService

All the main(String[]) function does is print out a randomly generated
Guid.

Change-Id: I1260921814b76ae4f48d51feae41bf6e5250c2e2
Signed-off-by: Allon Mureinik <amureini@redhat.com>
restapi: Exceptions in FenceOptionsParserTest

Used proper expectations mechanism introduced in JUnit 4 in order to
make the code cleaner and easier to understand.

Change-Id: I464438a6952bf06b13e41d2bb4933cfe3f9a0127
Signed-off-by: Allon Mureinik <amureini@redhat.com>