[PATCH 00/10] xfstests: Stress tests improments v5

[Dmitry Monakhov]

1   add fio requirement V2
2   add configurable load factors
3   hardcode fops for determinable fsstests runs
4   fsstress add replace file operation
5   allow fsstress to use load factor where appropriate
6   move run_check to common.rc
7   add  fallocate/truncate vs AIO/DIO stress test
8   add  fallocate/punch_hole vs AIO/DIO stress test
9   add defragmentation stress tests for ext4
10  add disk failure simulation test

Known issues which can be triggered this test case:
287'th over EXT4 result in https://gist.github.com/dmonakhov/4994589
298'th (8'th patch) over XFS result in https://gist.github.com/dmonakhov/4994465
300'th and 301'th over EXT4 result in https://gist.github.com/dmonakhov/4770294
303'th over XFS result in https://gist.github.com/dmonakhov/4951456

Changes since V4
Rebase on top of current dev tree.


Changes since V2
Mostly code style cleanups accodring to Dave's comments
- add _scale_fsstress_args function
- move run_check function to common.rc
- Add more comments
- split combined e4defrag testcase in to disicated tescases