Remove some keystone resource parsers

Current "keystone" command can parse the specified resources(tenant,
user, role, service) by itself. Then it is unnecessary to translate
resource names to resource ids in devstack.

This patch removes these resource parsers from devstack for cleanup.

Change-Id: Ibae06581b471f02168b559b4ca0c10f14996d661
Merge "Remove some keystone resource parsers"