acceptance/eventlet: make sure apache is stopped

When testing upgrades, we have some cases where we apply the wsgi
manifest first and then eventlet. The problem is apache which is
started so ceilo-api cannot be started because ports are already in use.

So this patch installs Apache on eventlet manifest and makes sure
the service is stopped before trying to start ceilo-api with eventlet.

Change-Id: I4aae37fcbf60e61c0eb8385dedc950674661b592

spec/acceptance/ceilometer_with_mysql_spec.rb

@@ -8,6 +8,13 @@ describe 'ceilometer with mysql' do
       pp= <<-EOS
       Exec { logoutput => 'on_failure' }
 
+      # make sure apache is stopped before ceilometer-api eventlet
+      # in case of wsgi was run before
+      class { '::apache':
+        service_ensure => 'stopped',
+      }
+      Service['httpd'] -> Service['keystone']
+
       # Common resources
       case $::osfamily {
         'Debian': {