Add API Sample tests for Snapshots extension.

Partially implements blueprint nova-api-samples
Modifies fakes to produce a real timestamp
Fixes bug 1126211

Change-Id: I8973d50fa67abbf6f96684ff8a0b898912f09caf
Makes sure required powervm config options are set

Fixes bug 1132931

Defaulting values of powervm_img_local_path and
powervm_img_remote_path configuration options.

Change-Id: I310422bccb84fc0ae12e43b06b4d85e683a91daf
Bump python-quantumclient version to 2.1.2

Fixes bug 1133381

Change-Id: I0592032e9df1fc165631e7e85f1cdc9ead4beb30
Remove un-needed methods.

These methods are un-needed. Their functionality is now provided by the
HostAPI and ComputeRPCProxyAPI.

Change-Id: I771f1e4669f8b7fb779a0fec0209c3e2a899a469
Merge "Bump python-quantumclient version to 2.1.2"
Merge "Makes sure required powervm config options are set"
Merge "Add API Sample tests for Snapshots extension."