SF patch 1501987: Remove randomness from test_exceptions,

SF patch 1501987:  Remove randomness from test_exceptions,
from ?iga Seilnacht (sorry about the name, but Firefox
on my box can't display the first character of the name --
the SF "Unix name" is zseil).

This appears to cure the oddball intermittent leaks across
runs when running test_exceptions under -R.  I'm not sure
why, but I'm too sleepy to care ;-)

The thrust of the SF patch was to remove randomness in the
pickle protocol used.  I changed the patch to use
range(pickle.HIGHEST_PROTOCOL + 1), to try both pickle and
cPickle, and randomly mucked with other test lines to put
statements on their own lines.

Not a bugfix candidate (this is fiddling new-in-2.5 code).