Remove some useless methods from cyclades
Refs: #4139
Reason: some methods are now fully implemented by compute api callsMethods: all servers_get and all RestClient servers_* methods
Adjust ComputeClient & tests to compute v2
Complete ComputeRestApi tests for compute v2
Make iteration counter pretty
Update all get/delete ComputeRest tests
Update 1st level _get tests for ComputeRestClient
Complete basic compute v2 implementation
Pending: adjust unitests, test against an openstack deployment
Implement servers/?/action/? ReST and methods
Apply changes to call-level methods
Implement OScompute_v2 servers/?/metadata/? calls
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