enable merge sdc client part into Distribution release image

. update the defaultConfig.json file to include sdc client configuration
. update the DistriubtionActivator to enable parse sdc client and k8s plugin
. rename xacml pdp to k8s
. fix distribution run-time issue

Change-Id: If267f5c256b19ebdbe7b7b2869afcf2f570e4b24
Issue-ID: MULTICLOUD-576
Signed-off-by: liboNet <libo.zhu@intel.com>
9 files changed