apache-frontend: Omit frontend otherwise the promise timeout

  The promise returns too much data into the PIPE, if it is the case, it makes
  the promise much much slower, causing constant timeout

software/apache-frontend/common.cfg

@@ -69,7 +69,7 @@ mode = 0644
 [template-apache-frontend]
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/instance-apache-frontend.cfg
-md5sum = cc64151e4fe953f15f7ea8cf20718d84 
+md5sum = a245c933193f067457282c6e2c506191 
 output = ${buildout:directory}/template-apache-frontend.cfg
 mode = 0644
 

software/apache-frontend/instance-apache-frontend.cfg

@@ -270,9 +270,9 @@ pid-file = $${directory:run}/httpd.pid
 protected-path = /
 access-control-string = none
 cached-rewrite-file = $${directory:etc}/apache_rewrite_cached.txt
-frontend-configuration-verification = ${apache-2.2:location}/bin/httpd -Sf $${:frontend-configuration}
+frontend-configuration-verification = ${apache-2.2:location}/bin/httpd -Sf $${:frontend-configuration} > /dev/null
 frontend-graceful-command = $${:frontend-configuration-verification}; if [ $? -eq 0 ]; then kill -USR1 $(cat $${:pid-file}); fi
-cached-configuration-verification = ${apache-2.2:location}/bin/httpd -Sf $${:cached-configuration}
+cached-configuration-verification = ${apache-2.2:location}/bin/httpd -Sf $${:cached-configuration} > /dev/null
 cached-graceful-command = $${:cached-configuration-verification}; if [ $? -eq 0 ]; then kill -USR1 $(cat $${apache-configuration:cache-pid-file}); fi
 
 # Apache for cache configuration