NetApp fix eseries unit test mock clean

This patch fixes the issue of mock not getting
cleaned for requests in unit tests.

Closes-Bug: #1353506

Change-Id: Iab401021d7f180ff1f2bf3ed79166699112cc367
(cherry picked from commit 140956515327494a53de6ad09c35690624248f0a)
Merge "NetApp fix eseries unit test mock clean" into proposed/juno