and MockCSIManager to support the call counting
that csi_hook_test expects
instead of implementing csimanager
interfaces in two separate places:
* client/allocrunner/csi_hook_test
* client/csi_endpoint_test
they can both use the same mocks defined in
client/pluginmanager/csimanager/
alongside the actual implementations of them.
also refactor TestCSINode_DetachVolume
to use use it like Node_ExpandVolume
so we can also test the happy path there
following ControllerExpandVolume
in c6dbba7cde,
which expands the disk at e.g. a cloud vendor,
the controller plugin may say that we also need
to issue NodeExpandVolume for the node plugin to
make the new disk space available to task(s) that
have claims on the volume by e.g. expanding
the filesystem on the node.
csi spec:
https://github.com/container-storage-interface/spec/blob/c918b7f/spec.md#nodeexpandvolume
