Remove CLM issues with commons-collections

We know that we are not configuring an LDAP PIP in our
use of the XACML open source. The LDAP implementation
uses Apache Velocity, which uses a very old version
of commons-collections that has security issues. So
we can exclude commons-collections from the build.

Issue-ID: POLICY-507
Change-Id: I735eae4fe507ad016d9b0b49e67536415edb9820
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>