Update create_userrc to openstackclient commands

Updated keystoneclient commands in tools/create_userrc.sh
to their openstackclient equivalents.

Change-Id: I03c17cfc9740c3eb257152c95d9c4f021db2c89e
Merge "Update create_userrc to openstackclient commands"
Merge branch 'master' of github.com:openstack-dev/devstack