[PATCH 0/8] xfstests: Stress tests improments v3

[Dmitry Monakhov <dmonakhov@xxxxxxxxxx>]

This is third version of the patch series, previous version
can be found here: http://oss.sgi.com/archives/xfs/2012-09/msg00328.html

xfstests-add-fio-requirement-V2
xfstests-get-rid-of-hardcoded-sbin-mkfs
xfstest-add-configurable-load-factors
xfstest-allow-fsstress-to-use-load-factor-where-appr
run-check-to-common_rc
add-fallocate-truncate-vs-AIO-DIO-stress-test
add-fallocate-punch_hole-vs-AIO-DIO-stress-test
add-defragmentation-stress-tests-for-ext4

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.