Add fenix plugin for host maintenance.
This feature creates plugin for fenix, create_vnf_maintenance() in VNFM and
VNFMaintenanceAlarmMonitor to create alarm for Fenix. And the feature modifies
alarm_receiver and CRUD in VNFM.
After this feature, all VNF has ALL_MAINTENANCE resource to interacts
with Fenix plugin and [VDU_NAME]_MAINTENANCE if VDU has maintenance property.
[VDU_NAME]_MAINTENANCE will use to perform VNF software modification.
Currently, the plugin can perform CRUD constraints for maintenance,
scale in/out and migration for MIGRATE and LIVE_MIGRATE. The feature has
functions for OWN_ACTION with modified healing, but it not works based on
default vnf workflow in Fenix. And The feature doesn't support server_group
and related with HA like switch over because of unsupported in Tacker.
So these features will be enhance after adding required.
Co-Authored-By: Hyunsik Yang <yangun@dcn.ssu.ac.kr>
Implements: blueprint vnf-rolling-upgrade
Change-Id: I34b82fd40830dd74d0f5ef24a60b3ff465cd4819
df0ba6b7e0