[WIP]Fixes #2121 golint issues (#712)
[WIP]Fixes #2121 golint issues (#712)

* Comments for Labels & Label Selector Operators
Signed-off-by: Julio Cezar M <d5bdeb4734a24734a3e3e28f268d148ca63c3315@gmail.com>

prateekpandey14/maya,AmitKumarDas/maya,AmitKumarDas/maya,openebs/maya,openebs/maya,openebs/maya,prateekpandey14/maya