PRs via GitHub: use a personal fork

[Andrew Phillips]

Quick one (obvious, in hindsight) that just tripped me up: use a  
branch on a personal fork of the mirrored repo, rather than creating a  
branch on the mirror repo itself (if you have that right).

I just submitted a PR [1] based on a branch created on the mirrored  
repo only to see the PR automatically closed when the next repo mirror  
job kicked in and deleted the branch ;-)

ap

[1] https://github.com/jclouds/jclouds-karaf/pull/2