Deletion of branches doesn't appear to be working

[jwir3]

Right now, when the following command is run:

scottj@corellia:~/Source/gitbranchhealth$ python gitbranchhealth/branchhealth.py -d 4 -r origin -D

Within the gitbranchhealth directory, the following results are shown:

refs/remotes/origin/issue-1:             1 week ago
refs/remotes/origin/issue-7:             1 week ago
refs/remotes/origin/issue-5:             6 days ago
refs/remotes/origin/issue-2:             5 days ago
refs/remotes/origin/issue-3:             2 days ago
refs/remotes/origin/issue-14:            2 days ago
refs/remotes/origin/issue-6:             2 days ago
refs/remotes/origin/issue-9:             6 minutes ago

Because of the passed-in -D option, the branches origin/issue-1 and origin/issue-7 should be removed. They aren't, however.

This issue covers the following tasks:

• Add debug output to determine why the deletion isn't working.
• Add unit tests to cover branch deletion
• Refactor the branch code to contain deletion, in support of the above unit tests
• Add some type of user communication to ensure branches are deleted (at least an acknowledgement that this has happened, but preferably some type of switch to confirm that it should take place, with an override, perhaps -f, --force).