do not manage python-greenlet anymore

Packaging already manages python-greenlet dependency for a while.
Stop using Puppet for managing this dependency.

Change-Id: Iaba6e499b1185d75930f0e7b0ca587e9f8705e5a

manifests/init.pp

@@ -444,12 +444,6 @@ class nova(
 
   Nova_config<| |> ~> Exec['post-nova_config']
 
-  # TODO - see if these packages can be removed
-  # they should be handled as package deps by the OS
-  package { 'python-greenlet':
-    ensure  => present,
-  }
-
   if $install_utilities {
     class { '::nova::utilities': }
   }
@@ -459,9 +453,8 @@ class nova(
   anchor { 'nova-start': }
 
   package { 'python-nova':
-    ensure  => $ensure_package,
-    require => Package['python-greenlet'],
-    tag     => ['openstack'],
+    ensure => $ensure_package,
+    tag    => ['openstack'],
   }
 
   package { 'nova-common':

spec/classes/nova_init_spec.rb

@@ -11,13 +11,9 @@ describe 'nova' do
      end
 
       it 'installs packages' do
-        is_expected.to contain_package('python-greenlet').with(
-          :ensure  => 'present',
-        )
         is_expected.to contain_package('python-nova').with(
-          :ensure  => 'present',
-          :require => 'Package[python-greenlet]',
-          :tag     => ['openstack']
+          :ensure => 'present',
+          :tag    => ['openstack']
         )
         is_expected.to contain_package('nova-common').with(
           :name    => platform_params[:nova_common_package],