Set display name in apache processes

This change makes apache set process group name in the process name,
so when listing the processes the user can easily identify what's
running in each apache process. This is specially useful to debug
memory consumption or when a process consumming too much CPU.

Change-Id: I9787980052f451f452d3b8e5e51385ad5aa01e6a
diff --git a/files/apache-keystone.template b/files/apache-keystone.template
index 805e7b8..fc8731c 100644
--- a/files/apache-keystone.template
+++ b/files/apache-keystone.template
@@ -2,7 +2,7 @@
 Listen %ADMINPORT%
 
 <VirtualHost *:%PUBLICPORT%>
-    WSGIDaemonProcess keystone-public processes=5 threads=1 user=%USER%
+    WSGIDaemonProcess keystone-public processes=5 threads=1 user=%USER% display-name=%{GROUP}
     WSGIProcessGroup keystone-public
     WSGIScriptAlias / %PUBLICWSGI%
     WSGIApplicationGroup %{GLOBAL}
@@ -12,7 +12,7 @@
 </VirtualHost>
 
 <VirtualHost *:%ADMINPORT%>
-    WSGIDaemonProcess keystone-admin processes=5 threads=1 user=%USER%
+    WSGIDaemonProcess keystone-admin processes=5 threads=1 user=%USER% display-name=%{GROUP}
     WSGIProcessGroup keystone-admin
     WSGIScriptAlias / %ADMINWSGI%
     WSGIApplicationGroup %{GLOBAL}