Fix octavia installation in case of aio deployment

In case of aio deployment for testing purposes octavia api and
manager services are run  on the same node.
Run explicitly 'octavia.api' and 'octavia.manager' instead of calling
'octavia' on the expected appropriate node.

Related-PROD: PROD-22019

Change-Id: If37c00b8d763b4cc5a06cd0e725d72b7499bd564
1 file changed