This change adds the ec2api service using the
tripleo::profile::base::nova::ec2api profile.
The deprecated nova-cert service is not supported, and therefore the
RegisterImage action is not supported either.
Change-Id: I2510fd4ed935d8423216fff9ce3adf2d69c9c804
Depends-On: If4b091e1ca02f43aa9c65392baf8ceea007b7cfb