added second dmi-stub to cps-charts

added second dmi-stub to cps-charts

- cps-charts should support two dmi-stub instances, each uses its own
  pod. Since each pod should return its own Servlet URI (dmi-stub
address)
- the services for dmi-stub instances should be defined seperately since
  a fixed dmi-stub address is required. (otherwise adress would be
dynamic on each deployment)
- env. variable DMI_STUB_SERVER_PORT is used to override ther server
  port for second dmi-stub (ports should be different on pod levels)
- for the latest architecture please visit the solution page:
   https://lf-onap.atlassian.net/wiki/spaces/DW/pages/347537434/CPS-2933+Kubernetes+container+management+system+for+CPS+and+NCMP
- updated Uri address for dmi stub services

Issue-ID: CPS-2934

Change-Id: I1c6bda107ed362278dea7c26fa842a286de76009
Signed-off-by: halil.cakal <halil.cakal@est.tech>