Add compute keypair commands

Add create, delete, list, show keypair commands

Part of blueprint nova-client

Change-Id: Ieba00d3b3e3a326f875c01ac2a2b9bbd036cd7c9
Add fixed-ip and floating-ip commands

Adds:
* fixed-ip commands: add, remove
* floating-ip commands: add, create, delete, list, remove
* floating-ip-poo command: list

Also uses NAME_ATTR in the Resource class if present to determine
the attribute to be used for searching in utils.find_resource()

Change-Id: Ifd8fa60f880fc4050dea182ac24553cc2c4bff15
Adds image `create` and `delete` functionality.

We use the V1 API for `create` since it does not
yet exist in the V2 API in glanceclient.

For blueprint glance-client.

Change-Id: Ifa819c14f6a013f4530d16247a671e5a1c740a28
Merge "Adds image `create` and `delete` functionality."
Merge "Add fixed-ip and floating-ip commands"
Merge "Add compute keypair commands"