Squid: Avoid cycle between java packages; Changed PMD rules version

https://trello.com/c/A0rrIWb0

Configured the violation to fail the build
(see: http://review.motechproject.org/#/c/3311/)

Changed PMD rule version

Change-Id: Ia9158d8227a72d7eab8f83b05d2e6832cc5d32b0