Stop overriding placement::wsgi::apache::api_port

Default value of the api_port parameter has been updated to 8778. Thus
we no longer need to override the parameter.

This also resolves the type validation failure with puppetlabs-apache
8.0.0, which no longer accepts a string value for apache::vhost::port.

Change-Id: I3c29f018f6508f992181945de0cf6091dde44502

packstack/puppet/modules/packstack/manifests/placement.pp

@@ -24,7 +24,6 @@ class packstack::placement ()
 
     class { 'placement::wsgi::apache':
       bind_host => $bind_host,
-      api_port  => '8778',
       ssl       => false,
       workers   => hiera('CONFIG_SERVICE_WORKERS'),
     }