Enabled dashboard in ceph-anisble deployment

[sunilkumarn417]

Signed-off-by: sunilkumarn417 sunnagar@redhat.com

• Code changes for enabling dashboard on ceph-ansible module.
• Enabled dashboard on ceph-ansible smoke test suites.

Successful test link: http://pulpito.ceph.redhat.com/sunnagar-2020-10-20_03:26:16-smoke:ceph-ansible-master-distro-basic-clara/

[rakeshgm]

can you also enable dashboard in system-tests suite.