pylint fixes: remove redundant parens, fix comparison order

pylint fixes: remove redundant parens, fix comparison order

removed redundant parens in if and while clauses
use var != constant, not constant != var.
Python doesn't allow for assignment in if statements, so we don't have
to use the old C workarounds

remove unwanted commas
use raw strings for regexps with backslashes, e.g. r'\s' instead of '\s'

Change-Id: I7aad645dd3d7f4b4b62f4e4510a425611c9d28f2
Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>