#31 Fix compatibility with old productmd
Merged by lsedlar. Opened by lsedlar.
lsedlar/compose-utils revert-compat  into  master

There are multiple places where 1.1 is assumed, so we have to depend on
it. The test for legacy .composeinfo file needs to be updated as 1.1
does not include variants with dashes in identifiers.

Pull-Request has been merged by lsedlar