The packag selection shown in the UI does not include the base
packages that will be included in the image, and they cannot,
because the base packages depends on the output type, and the UI
packages shown in the UI are independent of the output type.
It is possible to select packages incompatible with the base
packages. Discover this sooner rather than later, by including
the base packages in the final depsolve before creating the
pipeline.
In the future the result of the depsolve will be used to create
the pipeline, so this is another prerequisite for moving from
the dnf to the rpm stage.
Also depsolve the build packages for the same reason. Note that we
always set clean to false in this case, as the depsolving of the
main packages would have performed any cleaning necessary.
Also extend dnf-json to support excluding packages from depsolving.
Signed-off-by: Tom Gundersen <teg@jklm.no>
6d94028976