This patch enables CNF v2 API to operate using Helm chart.
New vimType 'ETSINFV.HELM.V_3' is introduced.
Since helm VIM uses existing functions of k8s VIM, k8s VIM code
is refactored to share between k8s VIM and helm VIM.
Implements: blueprint helmchart-k8s-vim
Change-Id: I0329a0d43294181b7ffb1494bb5dd2d0528eb5dc
bb7b3cfce9