There are around 300 regression tests, 250 being in tests/bugs. Running
partial set of tests/bugs is not easy because this is a flat directory
with almost all tests inside.

It would be valuable to make partial test/bugs easier, and allow the use
of mulitple build hosts for a single commit, each running a subset of
the tests for a quicker result.

Additional changes made:
- correct the include path for *.rc shell libraries and *.py utils
- make the testcases pass checkpatch
- arequal-checksum in afr/self-heal.t was never executed, now it is
- include.rc now complains loudly if it fails to find env.rc

Change-Id: I26ffd067e9853d3be1fd63b2f37d8aa0fd1b4fea
BUG: 1178685
Reported-by: Emmanuel Dreyfus <manu@netbsd.org>
Reported-by: Atin Mukherjee <amukherj@redhat.com>
URL: http://www.gluster.org/pipermail/gluster-devel/2014-December/043414.html
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/9353
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Reviewed-by: Emmanuel Dreyfus <manu@netbsd.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1. errno was being set after gf_log() in posix_{f}handle_pair, this
would cause errno to be overwritten.

2. dht would expect -1 for indication of failure in setxattr
callback (dht_err_cbk()). posix_{f}setxattr has been changed to set
op_ret as -1 instead of -op_errno.

3. dict_foreach() has been changed to return an error if the invoked
fn() returns < 0.

Bug report and test case credits to Zorro Lang <zlang@redhat.com>

Change-Id: I96c15f12a5d7717b7584ba392f390a0b4f704a98
BUG: 1051896
Signed-off-by: Vijay Bellur <vbellur@redhat.com>
Reviewed-on: http://review.gluster.org/6684
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>