Changes:
- Removed unnecessary packages from build roots. Build packages are
added on-demand.
- Some stages changed order in the OS pipeline for azure-rhui. This
will have no functional effect.
- RHSM Facts stage added to all RHEL 7 manifests. This wont be used
since RHEL 7 is not built in the cloud service. The RHSM fact is
added by the test case generator to all image types to test that the
option is working properly.
- Azure archive pipeline renamed to xz like in all the other rewritten
image types that use the xz pipeline.
- Azure image filename before archiving has changed from 'disk.vhd' to
'image.vhd'. Again, this will have no functional effect because the
name of the final artifact is unchanged (disk.vhd.xz).
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