Conflicting ports with couchdb

[bnjbvr]

There is a conflict between the ports used by cozy dev:start and the couchdb service, required for running cozy-fuse.

[jsilvestre]

Thank you for the report, that's something more generic actually, we could report this as an issue of cozy-fuse too. I don't know how to handle this "multiple couchdb running at the same time" problem. ping @frankrousseau @kloadut