We should exit 1 if radosgw is not executable

An exit 0 means everything went okay - we should exit 1 if there is a problem in
starting radosgw.

Signed-off-by: David Moreau Simard <dmsimard@iweb.com>
Verify that radosgw started, return appropriate exit code

Changed "/etc/init.d/radosgw status" into a function that now
returns the appropriate exit code.
We now also verify that radosgw actually started properly.

Signed-off-by: David Moreau Simard <dmsimard@iweb.com>
Add a verbose argument and some verbosity

This allows a user to use "-v|--verbose" to get some insight as to
what could be preventing radosgw from starting properly.

Signed-off-by: David Moreau Simard <dmsimard@iweb.com>
Merge pull request #811 from dmsimard/wip_6710

Be more verbose in radosgw init script issues, return the right exit codes

Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>