Fix site-packages path for python 2.7

CentOS7 comes with python2.7 included, so we need to
update path to site-packages directory

Blueprint: master-on-centos7

Compatible with CentOS6 & CentOS7 master node

Change-Id: Ifa7026ef5e090d740797567e99dae0f08e41c310

deployment/puppet/nailgun/manifests/uwsgi.pp

@@ -6,8 +6,20 @@
 #
 class nailgun::uwsgi(
   $production,
+  $venv = '/usr',
 ) {
 
+  if $::osfamily == 'RedHat' {
+    case $operatingsystemmajrelease {
+      '6': {
+        $site_packages_path = inline_template("<%= @venv %>/lib/python2.6/site-packages")
+      }
+      '7': {
+        $site_packages_path = inline_template("<%= @venv %>/lib/python2.7/site-packages")
+      }
+    }
+  }
+
   if $::physicalprocessorcount > 4  {
     $physicalprocessorcount = 8
   } else {

deployment/puppet/nailgun/templates/uwsgi_nailgun.yaml.erb

@@ -6,7 +6,7 @@ uwsgi:
   socket: :8001
   plugin: python
   chown-socket: nginx:nginx
-  pythonpath: <%= @venv %>/lib/python2.6/site-packages/nailgun
+  pythonpath: <%= @site_packages_path %>/nailgun
   touch-reload: /var/lib/nailgun-uwsgi
   virtualenv: <%= @venv %>
   module: nailgun.wsgi
@@ -16,4 +16,4 @@ uwsgi:
   logto: /var/log/nailgun/app.log
   mule: 1
   lazy: true
-  shared-pyimport: <%= @venv %>/lib/python2.6/site-packages/nailgun/utils/mule.py
+  shared-pyimport: <%= @site_packages_path %>/nailgun/utils/mule.py