Update j2bugzilla to version 2.2.1

Bugzilla 4.4.3 (April 17, 2014) and later remove the old cookie based session
authentication from the Web Services API and replace it with a login token.

j2bugzilla 2.2.1 supports token-based session authentication.

Change-Id: Id530f1bfeefedf7bc26e9b1e3936807f0fe8be73