Allow ansible venv path to be customized

Move hardcoded ansible VENV path into an environment.d export,
allowing for the path to be changed and allowing other elements
to add additional packages into the virtualenv.

Change-Id: Ia48ee19b24504f78c696404f695ba27f9b979cd6
Switch to the default os-refresh-config base dir

The default os-refresh-config base dir changed over 6 months
ago in I98e93d91685ae25ae74a5470483a1cc8b97da4e5.
Using the deprecated default may cause problems in the future,
instead query os-refresh-config for the default directory.

Change-Id: Ia5b8fceb83ebd32d9a537d793a80cd2b8341c8ec
Migrate ironic-api to svc-map

This patch migrates the ironic-api element from map-services to
svc-map by adding a svc-map file and adding the -a option to
os-svc-install script calls.

Change-Id: Ie927ac7dac5411e93a11420eb3ef1a03b04c0fba
Merge "Migrate ironic-api to svc-map"
Merge "Allow ansible venv path to be customized"
Merge "Switch to the default os-refresh-config base dir"