Migrate heat-api element to svc-map

This patch migrates the heat-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: I66c9e520f04415953ea9cf2ef57e40a7c011d366
Merge "Migrate heat-api element to svc-map"