https for the ubuntu repo and option to remove /etc/salt/minion.

[jochumdev]

This PR adds both,

the https uri is something not all people want:

• if they dont have apt-transport-https
• salt doesnt detect theres a http repo which means this repo will get added a second time

[herisanu]

Could you also please add an option to remove /etc/salt/master?
My use-case is testing via Vagrant with salt provider should work even before i run a highstate.

[jochumdev]

Done thanks for the suggestion @herisanu

[gravyboat]

Looks good, thank you.