The describe of Compute "aggregate" in command-objects and commands
documents use "a grouping of servers", but exactly that should be a
grouping of compute hosts. "server" object in OSC is a virtual machine
instance, and server group should be "grouping of servers".
Change-Id: Ib034fed15f11fc3e756985b3131a9922129ed6bf
Closes-Bug: #1563172
Related-Bug: #1542171
Support "aggregate unset" command in order to
remove the property of aggregate object in OSC.
Change-Id: I49645135586362f0fd251f5e4a4c03eff273d9e9
Closes-Bug: #1559866
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