Currently we are making MBR disk images for qcow2 and partitioned disk,
so the UEFI packages aren't required at this point.
Move the clearpart command into compose.py so that in the futute it can
use clearpart --disklabel to create a GPT image, and add the required
packages to the package set.
This adds the ability to build a tar output image. The /compose and
/compose/types API routes are now available.
To start a build POST a JSON body to /compose, like this:
{"recipe_name":"glusterfs", "compose_type":"tar", "branch":"master"}
This will return a unique build id:
{
"build_id": "4d13abb6-aa4e-4c80-a671-0b867e6e77f6",
"status": true
}
which will be used to keep track of the build status (routes for this
do not exist yet).
