QA:Testcase btrfs migration

= Description = | Migrating a filesystem from Ext4 (or other) to btrfs. NOTE: As of writing, btrfs does not have a working fsck.

= How to test = |
 * 1) Create an ext4 partition
 * 2) Dump some data on it (large and small files)
 * 3) yum install btrfs-progs
 * 4) unmount the ext4 filesystem to be migrated
 * 5) Run btrfs-convert on the partition
 * 6) Mount partition
 * 7) Verify if files are still a) present and b) sane.
 * 8) Verify if a backup snapshot is created (TODO:  Verify that this is default behavior)

= Expected Results = |
 * 1) btrfs-progs install successfully
 * 2) btrfs-convert runs successfully
 * 3) Data should be present and sane