OC: add contrail admin user

Update static models with opencontrail_admin_user and
opencontrail_admin_password parameters.
The change has been delivered to all non-deprecated models
that include system.neutron.control.opencontrail.cluster or
system.neutron.control.opencontrail.single, such as:
- os-ha-contrail
- os-ha-contrail-40
- sl-os-contrail

PROD-23356

Change-Id: I2ba2ca01a2a9d3cf1ad16dd7edfe82811f21e4b2
3 files changed