Make formats.mount use explicit keywords instead of kwargs.
Make formats.mount use explicit keywords instead of kwargs.

*args, *kwargs idiom is not really appropriate here.

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

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