Check the status of the format being mounted.
Check the status of the format being mounted.

Previous code checked the status of the format attribute. It seems
to make more sense to wait and check the status of the format selected
to be actually mounted, which may be the originalFormat attribute.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

rvykydal/blivet,AdamWill/blivet,jkonecny12/blivet,jkonecny12/blivet,vpodzime/blivet,vojtechtrefny/blivet,dwlehman/blivet,rhinstaller/blivet,vpodzime/blivet,AdamWill/blivet,dwlehman/blivet,rhinstaller/blivet,vojtechtrefny/blivet,rvykydal/blivet