Update Octavia parameters in tcp-qa env contexts

- Enable Octavia HA for several MCP deployment configs
- For 2.8 configs with Octavia HA enable ACTIVE_STANDBY
topology (for 2019.2.7 this parameter is not yet available)
- Enable spare_amphora_pool_size for some configs

Change-Id: I4dfafca04d3cb5525434906da518592b5a82dd6d
Related-Prod:#PROD-00000
6 files changed