Fixed point test script

BZ: 197723

This python script performs several checks on fixed point parameters:

- Bound check: Can we set a value?
- Sanity check: If we get this previously set parameter, is the
  value approximately the same? There should be at maximum a
  quantum difference between the original value and the returned value.
- Consistency check: Can we set the value we got from the sanity check?
- Bijectivity check: If we get the parameter we set a second time,
  is the result the same as the value we got from the set we did in the
  Sanity check?

Change-Id: I7b4d61ec740139b0ee70a44b6b38009507a569ee
Signed-off-by: Mattijs Korpershoek <mattijsx.korpershoek@intel.com>