Update git submodules

Update git submodules

* Update docs/submodules/policy/engine.git from branch 'master'
  to b2341e2ee94605af08728a38f835e9545ab60cac
  - Merge "Remove powermock to increase coverage"
  - Remove powermock to increase coverage

    Removed powermock from the junit tests of these classes to increase
    reported sonar coverage:
      RESTfulPAPEngine
      BrmsGateway

    Typically added override methods to the classes under test, to replace
    the overrides originally provided by powermock.

    Also needed to add code to RESTfulPAPEngineTest to clear the XACML
    properties before the test ran.  Modified to use the existing
    XACMLProperties.reloadProperties() method.

    Also modified PolicyNotificationMailTest to use a host/port that
    has no listener so that the test runs faster.

    Fixed some newly introduced sonar issues.

    Change-Id: I65e36b01e9506987032eb21baac808ed3dfd4f47
    Issue-ID: POLICY-1937
    Signed-off-by: Jim Hahn <jrh3@att.com>