ONOS scenario according to wanted config file structure

ONOS scenario according to wanted config file structure

Replaces:
- https://gerrit.opnfv.org/gerrit/#/c/5999/
- https://gerrit.opnfv.org/gerrit/#/c/6003/

Description:
- Onos scenarios updated with needed dea and dha overrides, no scenario
  specific information in other config files such dha, dea_base, dea_pod
  override, etc.
- Added a virtual POD for Huawei-china specific needs, i.e. DNS and NTP.
- Small fix in deploy-conf.py

Change-Id: I85fe2fc4e9ec5fe0bc98ae7b399f2e49af6450f9
Signed-off-by: Jonas Bjurel <jonas.bjurel@ericsson.com>