TestCase.assertRaisesRegexp was renamed to assertRaisesRegex in Python
3.2, so rename to fix a warning during test execution.
(Bitbake rev: 9bc2ca3197bff7a5ef6e0ece6bfef0cda68b808e)
Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>