Updates Help Text on Quobyte Volume URL Option
Updates Help Text on Quobyte Volume URL Option

This microchange updates the quobyte_volume_url option help text to
point out that using a DNS SRV record is the best solution for this
config option.

Change-Id: I0ffc5da37d342b722098ea36e11e269c3ae463b3

phenoxim/cinder,j-griffith/cinder,Datera/cinder,openstack/cinder,mahak/cinder,phenoxim/cinder,mahak/cinder,Datera/cinder,openstack/cinder,j-griffith/cinder