Adding a sort-by parameter for the climateclient list command so that
when a list is retrieved, it will be order by the column that the user
prefered.
Default value will be 'name' for leases and 'hypervisor_hostname' for
hosts (which are more meaningful order attributes than id).
Change-Id: Ie6a4df384770123ec5fc4cf43823ce5ef1a47ca5
Closes-Bug: #1304595
Cloud Admin must have possibility to dedicate hosts to Climate.
Consequently, adding host-{list,CRUD} to shell commands.
Partially implements blueprint python-client
Change-Id: I93c52d4b9c29aad3c3ff7aba2a105adb60422466