The input options of qemu assembler do not require filesystem for every
partition. This patch makes it optional and omits the object in case it
is empty.
osbuild schema definition:
162797f206/assemblers/org.osbuild.qemu (L63)
This adds the wrapper object and a simple test for the ostree.commit
assembler.
See the osbuild documentation for details.
Signed-off-by: Tom Gundersen <teg@jklm.no>
Image size should not be specified for a tar image. When the tar
assembler was being created image size was not passed to it. However,
the TarAssemblerOptions contained a Size field which would default to 0.
This field is removed so that the tar assembler options no longer
specify a size. The assembler tests are also updated to reflect this
change.
