Updates the Compute-Volumes integration tests for Volume refactors

* Changed instances of storage_client/storage_behavior to
  blockstorage_client/blockstorage_behavior
* Removed parameters from function calls that are now set
  as defaults

Change-Id: I9600b7d3213064c4d4236dbb058b008254c6cdd3
Merge "Updates the Compute-Volumes integration tests for Volume refactors"