Older Linux distributions came with differently incomplete
btrfs-tools 0.19+git versions (2009-2013). Old mkfs.btrfs
needs minimum device size 256M.
Note the most simple way to skip btrfs-tools < 3.14 would be
btrfs property --help 2>&1 || ts_skip "btrfs too old"
but I want to include 3.12 because of Ubuntu Trusty on travis.
This patch partly reverts/rewrites the following commits:
7e604f3c - tests: don't skip case "output undefined"
076153f8 - tests: don't compare btrfs mount options
370d31f7 - tests: skip btrfs tests if version too old
Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
131e543794