Replace Keystone WSGI decoder by generic WSGI decoder

Change-Id: Iff93778b95e28293dd6ae59438708ea32ce57e5c
Depends-On: I42833a45aa593114cad330ee2bf2bc3b3d00497e
diff --git a/apache/meta/heka.yml b/apache/meta/heka.yml
index b2ff1f3..05d3b34 100644
--- a/apache/meta/heka.yml
+++ b/apache/meta/heka.yml
@@ -15,9 +15,10 @@
 {%- if site.type == 'keystone' %}
     keystone_wsgi:
       engine: sandbox
-      module_file: /usr/share/lma_collector/decoders/keystone_wsgi_log.lua
+      module_file: /usr/share/lma_collector/decoders/apache_wsgi_log.lua
       module_dir: /usr/share/lma_collector/common;/usr/share/heka/lua_modules
       config:
+        logger: openstack.keystone
         apache_log_pattern: >-
           {{ site.get('log', {}).get('custom', {}).format|default('vhost_combined') }}
 {%- endif %}