Backport of http://review.gluster.org/#/c/15006/

Change-Id: I3d274bdc2036392af942a17a0e0bf28f431c947b
BUG: 1360574
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: http://review.gluster.org/15047
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>

Provide options to control number of active background heal count and qlen.

Change-Id: Idc2419219d881f47e7d2e9bbc1dcdd999b372033
BUG: 1237381
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/11473
Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>
Tested-by: Gluster Build System <jenkins@build.gluster.com>