Add symlink on local git directory

We need that for zuul to properly fetch references
with /p/ path

Change-Id: If5cda9d3924cc4577d9a44e8cac6fef63cc4d17d

manifests/init.pp

@@ -121,7 +121,9 @@ class cgit(
     require => User['cgit'],
   }
 
-  file { '/var/lib/git':
+  $local_git_dir = '/var/lib/git'
+
+  file { $local_git_dir:
     ensure  => directory,
     owner   => 'cgit',
     group   => 'cgit',
@@ -129,6 +131,12 @@ class cgit(
     require => User['cgit'],
   }
 
+  file { "${local_git_dir}/p":
+    ensure  => link,
+    target  => $local_git_dir,
+    require => File[$local_git_dir],
+  }
+
   ::httpd::vhost { $vhost_name:
     port          => $https_port,
     serveraliases => $serveraliases,

spec/acceptance/basic_spec.rb

@@ -128,6 +128,10 @@ describe 'puppet-cgit module', :if => ['fedora', 'redhat'].include?(os[:family])
       end
     end
 
+    describe file('/var/lib/git/p') do
+      it { should be_linked_to '/var/lib/git' }
+    end
+
     describe file('/usr/lib/systemd/system/git-daemon.socket'), :if => ['fedora', 'redhat'].include?(os[:family]) && os[:release] >= '7' do
       it { should be_file }
       it { should be_owned_by 'root' }