Change tenant for oscore jobs

In order to have dedicated resources for oscore ci
jobs, we need to use new tenant - mcp-oscore-ci

other changes:
added concurrency parameter for tempest

Change-Id: If08ab68684b16c43a727d47a99a10f30527f4c52
Related-Prod: https://mirantis.jira.com/browse/PROD-15587
1 file changed