tests/quick: Replace Q[TRY]_VERIFY(a == b) by Q[TRY]_COMPARE(a, b).

tests/quick: Replace Q[TRY]_VERIFY(a == b) by Q[TRY]_COMPARE(a, b).

- Replace Q[TRY]_VERIFY(pointer == 0) by Q[TRY]_VERIFY(!pointer).
- Replace Q[TRY]_VERIFY(smartPointer == 0)  by
          Q[TRY]_VERIFY(smartPointer.isNull()).
- Replace Q[TRY]_VERIFY(a == b) by  Q[TRY]_COMPARE(a, b) and
  add casts where necessary. The values will then be logged
  should a test fail.

Change-Id: Ib9f4c2486af23c47990be4b9e004b965de226dcc
Reviewed-by: Mitch Curtis <mitch.curtis@theqtcompany.com>