Merge pull request #88 from chris-allan/shallow-and-remotes

Shallow and remotes
Refactor the TestRebase integration test

- Create open_pr() method in SandboxTest
- Test name and owner of rebased PR
Add simple scenarios to test latest merge options (shallow and remote)
merge master -D org -I include -E exclude: PR 82 (Add logic to create tag while updating submodules)
merge master -D org -I include -E exclude: PR 87 (Refactor the TestRebase integration test)