btrfs/131,btrfs/172,btrfs/206: add check for block-group-tree feature in btrfs

btrfs/131,btrfs/172,btrfs/206: add check for block-group-tree feature in btrfs

A new disk format option will make the no-holes option a requirement, so
add a helper to make sure that we aren't creating a fs with
BLOCK_GROUP_TREE by default, and skip the tests that require turning off
no-holes.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>