try and add some consistency with the show and delete commands.
replace 'show x' with 'display x'
change 'delete a y' with just 'delete y'
Change-Id: I47dfa8ee23ac5c41b355796415eb515155832f65
This is part2. Add support for these objects:
identity.project(v2.0)
identity.role(v2.0)
identity.user(v2.0)
identity.project(v3)
identity.role(v3)
identity.user(v3)
identity.group(v3)
Closes-Bug: #1400597
Change-Id: I270434d657cf4ddc23c3aba2c704d6ef184b0dbc