Skip older monotone versions for tests.
test-convert-mtn is known to work with 0.37 and 0.38, but fails with
0.31 (Debian etch). hghave now skips all versions up to 0.31.
updating working directory
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
pulling from ../a
searching for changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 2 changes to 1 files
(run 'hg update' to get a working copy)
1 files updated, 0 files merged, 1 files removed, 0 files unresolved