Correct param comments in docstring
Correct param comments in docstring

Some methods in cinderclient/v1/volumes.VolumeManager have 'volume'
paramter, but in docstring the paramter is 'server'. So change ":param
server:" to ":param volume:".

Change-Id: I75a86180a830d3ae875ee1aecd45f9a6e39f6e22

JioCloud/python-cinderclient,eayunstack/python-cinderclient,swamireddy/python-cinderclient,varunarya10/python-cinderclient,JioCloud/python-cinderclient,varunarya10/python-cinderclient,citrix-openstack-build/python-cinderclient,ntt-sic/python-cinderclient,swamireddy/python-cinderclient,scottdangelo/cinderclient-api-microversions,eayunstack/python-cinderclient,metacloud/python-cinderclient,ntt-sic/python-cinderclient,metacloud/python-cinderclient,citrix-openstack-build/python-cinderclient,scottdangelo/cinderclient-api-microversions