Do not pass verbose to rsync by default.

[jdufresne]

The verbose option can still be passed by the extra_opts
parameter, but it is no longer forced on the user.

[bitprophet]

The idea makes sense, but it technically breaks backwards compatibility, behavior-wise (users who are used to or rely on the verbosity will be surprised after an update.)

I poked and found #910 which should solve this for you - once that is merged you can deactivate -v by saying rsync_project(default_opts='pthrz') (which otherwise defaults to pthrvz - note the v.)

I'll close this, please watch #910 instead - I will do it this afternoon.