Create appContext and save to etcd

Create appContext and save to etcd

In this patch, following tasks are accomplished

1. Creation of appContext and storing the appcontexts for each app in
the compositeApp into etcd as part of the instantiation process
2. Added a util method to extract parameters from k8s manifest files.
3. Added a new testing script to auto create NCM artifacts through the NCM APIs
4. Modified the existing plugin_collection_v2.sh to better test the
orchestrator APIs.
5. Added logging to appcontext lib
6. Bug fix in the helm charts.

Issue-ID: MULTICLOUD-1064
Signed-off-by: Rajamohan Raj <rajamohan.raj@intel.com>
Change-Id: I1b0e4d1351ad3a083be529239748015ea5db2a41