Stop deploying Nova API in WSGI with Apache

It was suggested by Nova team to not deploying Nova API in WSGI with
Apache in production.
It's causing some issues that we didn't catch until now (see in the bug
report). Until we figure out what was wrong, let's disable it so we can
move forward in the upgrade process.

Note: once it's supported by Nova, we'll revert this patch.
Change-Id: I2712ca0b9626771cec1f3d98b04cc8c18eb1cb15
Related-Bug: 1661360

elements/puppet-stack-config/puppet-stack-config.pp

@@ -327,24 +327,11 @@ class { '::nova':
   debug              => hiera('debug'),
 }
 
-# Manages the migration to Nova API in mod_wsgi with Apache.
-# - First update nova.conf with new parameters
-# - Stop nova-api process before starting apache to avoid binding error
-# - Start apache after configuring all vhosts
-exec { 'stop_nova-api':
-  command     => 'service openstack-nova-api stop',
-  path        => '/usr/sbin',
-  refreshonly => true,
-}
-Nova_config<||> ~> Exec['stop_nova-api']
-Exec['stop_nova-api'] -> Service['httpd']
-
 class { '::nova::api':
   enable_proxy_headers_parsing => $enable_proxy_headers_parsing,
 }
 include ::nova::cell_v2::simple_setup
 include ::nova::placement
-include ::nova::wsgi::apache_api
 include ::nova::wsgi::apache_placement
 include ::nova::cert
 include ::nova::cron::archive_deleted_rows

elements/puppet-stack-config/puppet-stack-config.yaml.template

@@ -368,11 +368,8 @@ nova::api::enabled_apis:
   - osapi_compute
   - metadata
 nova::api::sync_db_api: true
-nova::api::service_name: 'httpd'
 nova::api::osapi_compute_workers: "%{::os_workers}"
 nova::api::metadata_workers: "%{::os_workers}"
-nova::wsgi::apache_api::ssl: false
-nova::wsgi::apache_api::bind_host: {{LOCAL_IP}}
 nova::wsgi::apache_placement::ssl: false
 nova::wsgi::apache_placement::bind_host: {{LOCAL_IP}}
 nova::wsgi::apache_placement::api_port: '8778'