Tests: Changes to tests for glfs-heal implementation.

volume heal <volname> info does not depend on self-heald
anymore so removed one complete test tests/bugs/bug-880898.t
and also removed specific tests related to that in
tests/basic/self-heald.t.

Change-Id: I2e5cd3641b86cad63af41c9564d57ab6ebb60742
BUG: 1039544
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/6515
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>