gate: use port 8041
gate: use port 8041

Currently in gate the API log are lost because we
run Gnocchi on port 80 without virtualhost and we
have no idea of how Apache is configured.

This change uses the port 8041 per default, so the devstack
plugin will create a virtualhost and logs will go in
/var/log/apache/gnocchi-XXX.

Change-Id: Id9cf55023c4b14a800af0cb893ca09f5f0afc85d

gnocchixyz/gnocchi,leandroreox/gnocchi,leandroreox/gnocchi,sileht/gnocchi,sileht/gnocchi,gnocchixyz/gnocchi