Description of problem:
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[doc] [ceph-ansible] : few functionality is available with ceph-ansible package but not supported in ceph 2.0. those functionality should be Documented

Version-Release number of selected component (if applicable):
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ceph-ansible-1.0.5-31.el7scon.noarch


How reproducible:
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always



few functionality/features are not supported in ceph 2.0 but those functionality/features are available when we install ceph-ansible or ceph-installer.

e.g.
1) purge-cluster is not supported but purge-cluster.yml is part of package and available in /usr/share/ceph-ansible. [A1]

2) 'clients' and 'restapis' role is not supported but it is available in site.yml, group_vars/all, roles/ [A2]

3) bluestore is Tech preview and available under osds.yml


Expected Result:-
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In my opinion It would be good if we can Document somewhere so  User/client know  that those functionality is available but not supported