Fix multiple usages of waiters

Fix consists of 2 parts:
- Calculate correctly left time for waiting in
  'scale_dcs_pod_amount_and_wait' function. Before, it had bug,
  where we were waiting less time than requested. And it led to the
  unexpected timeout errors.
  Example: it could fail waiting only 180sec having 600sec as real
  timeout.
- Reset 'attempts' on the instantiated 'waiter's to avoid
  redundant waiting reusing the single waiter instance.
  Example. On deletion of 20 PVCs we save about 1,5 minutes.
  In whole test suite we create much more PVCs than 20.

Change-Id: I5d06a63dd0c2c5bd67fdb09fef87948d65e6bf22

0 files changed, 0 insertions, 0 deletions