The rebase commands merges Debian packages from one branch
to another. The way that this works is the following:
1. Determine the current deployment of a running system.
2. Checkout the current deployment from an ostree repo.
3. Determine the packages installed in the current deployment.
4. Checkout the target branch to deploy.
5. Determine the packages installed in the target branch.
6. Determine the delta of the old packages that is not installed
in the target branch.
7. Install the packakge delta in the target branch.
8. Commit the changes.
9. Deploy the new branch.
Story: 2010867
Task: 48556
Change-Id: Ibd302712c3131c64978df50a32d3b1d075eac0e3
Signed-off-by: Charles Short <charles.short@windriver.com>