The independent aodh-api service has been removed and it is now run by
apache + mod_wsgi. Update the services mentioned accordingly.
Note:
- Apache Web server is already installed/enabled when keystone is
is installed
- Guide for OpenSUSE is not updated by this change, because OpenStack
packages for OpenSUSE haven't been for long time.
Close-bug: #1754212
Change-Id: I91544cee4c610ec5cb23f73f63efbd90da66b90a