BUG-2315: Remove dependency to OFJava-impl

- PacketInV10TranslatorTest switched to mocks
- code tidyup

Change-Id: I448d5354300f1b2e85503c9cc7445968ea2c8a4e
Signed-off-by: Marian Adamjak <marian.adamjak@pantheon.sk>
Signed-off-by: Michal Rehak <mirehak@cisco.com>