Change most keystoneclient commands to openstacklient in libs

migrated most keystoneclient commands from the following libs:
 ceilometer
 cinder
 ironic
 keystone
 marconi
 neutron
 nova
 savanna
 swift
 trove

Also need to set and unset openstackclient specific environment
variables from stack.sh

Change-Id: I725f30bc08e1df5a4c5770576c19ad1ddaeb843a
Merge "Change most keystoneclient commands to openstacklient in libs"