Removed memory leaks in CA Unit Tests.

These memory leaks are reported by Valgrind on the build server. With
these removed, the threshold value for memory leaks can be lowered and
further commits will be more resilient.

Change-Id: I606ec487c0a4f0207b85556ed0c48b4f34873907
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/1407
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>