Add TestWatcher so we know what test is running

Patch 2:
  - move testWatcher to base class
  - convert System.out.println in OvsdbPluginV3IT to use logger

Patch 3:
  - remove logs from mocked class (they never get called due to mock)

Change-Id: I21902bcd7595b16c8951ca04d1883c0745da6ba0
Signed-off-by: Flavio Fernandes <ffernand@redhat.com>