doc: Get rid of weird quoting

pandoc: Error producing PDF from TeX source.
! Package inputenc Error: Unicode char \u8:‟ not set up for use with LaTeX.

See the inputenc package documentation for explanation.
Type  H <return>  for immediate help.
 ...

l.6216 ... the objects access rights to "public‟

Change-Id: I23428930d167064b7c5790eea09daedbef06153a
Signed-off-by: Lubomir Rintel <lubo.rintel@gooddata.com>
Reviewed-on: http://review.gluster.org/5477
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Vijay Bellur <vbellur@redhat.com>