Install objgraph package

The objgraph library is used to grab object counts for memory leak
detection. We already have this installed on zuul01, but that appears
to have been done manually. This cements the install.

Since puppet-nodepool requires the same packages (yappi and objgraph),
wrap both of the installs in a conditional check to prevent puppet
errors about being defined in multiple places.

Change-Id: I63ab5a21f7b98341bb203883f40c2df5404687ba

manifests/init.pp

@@ -132,10 +132,20 @@ class zuul (
     }
   }
 
-  package { 'yappi':
-    ensure   => present,
-    provider => $pip_provider,
-    require  => Class['pip'],
+  if ! defined(Package['yappi']) {
+    package { 'yappi':
+      ensure   => present,
+      provider => $pip_provider,
+      require  => Class['pip'],
+    }
+  }
+
+  if ! defined(Package['objgraph']) {
+    package { 'objgraph':
+      ensure   => present,
+      provider => $pip_provider,
+      require  => Class['pip'],
+    }
   }
 
   if ! $zuulv3 {
@@ -204,6 +214,7 @@ class zuul (
       Package['build-essential'],
       Package['libffi-dev'],
       Package['libssl-dev'],
+      Package['objgraph'],
       Package['yappi'],
     ],
   }

spec/acceptance/basic_spec.rb

@@ -77,6 +77,7 @@ describe 'puppet-zuul module', :if => ['debian', 'ubuntu'].include?(os[:family])
 
   describe 'required pip packages' do
     packages = [
+      package('objgraph'),
       package('yappi'),
       package('zuul')
     ]