Change httpd Keystone log to keystone.log

The normal extension for log files is .log. Log rotation should
work because the extension is as expected.

Change-Id: Ia5e42ea9d953e8395b86ab58cdef6c2d852efc94
Related-Bug: #1359995

Author: Brant Knudson

files/apache-keystone.template

@@ -6,7 +6,7 @@ Listen %ADMINPORT%
     WSGIProcessGroup keystone-public
     WSGIScriptAlias / %PUBLICWSGI%
     WSGIApplicationGroup %{GLOBAL}
-    ErrorLog /var/log/%APACHE_NAME%/keystone
+    ErrorLog /var/log/%APACHE_NAME%/keystone.log
     LogLevel debug
     CustomLog /var/log/%APACHE_NAME%/access.log combined
 </VirtualHost>
@@ -16,7 +16,7 @@ Listen %ADMINPORT%
     WSGIProcessGroup keystone-admin
     WSGIScriptAlias / %ADMINWSGI%
     WSGIApplicationGroup %{GLOBAL}
-    ErrorLog /var/log/%APACHE_NAME%/keystone
+    ErrorLog /var/log/%APACHE_NAME%/keystone.log
     LogLevel debug
     CustomLog /var/log/%APACHE_NAME%/access.log combined
 </VirtualHost>

lib/keystone

@@ -467,7 +467,7 @@ function start_keystone {
 
     if [ "$KEYSTONE_USE_MOD_WSGI" == "True" ]; then
         restart_apache_server
-        screen_it key "cd $KEYSTONE_DIR && sudo tail -f /var/log/$APACHE_NAME/keystone"
+        screen_it key "cd $KEYSTONE_DIR && sudo tail -f /var/log/$APACHE_NAME/keystone.log"
     else
         # Start Keystone in a screen window
         screen_it key "cd $KEYSTONE_DIR && $KEYSTONE_DIR/bin/keystone-all --config-file $KEYSTONE_CONF --debug"