asserts on seL4_Errors now use test_error_eq

changed test_asserts that check seL4_Errors
to use test_error_eq to output errors in failed cases
that would otherwise be suppressed in a
KernelInvocationReportErrorIPC build config

Trivial: style fix

make the style checker happy

SELFOUR-1083 refactor tests because DEFINE_TEST_MAYBE was renamed to DEFINE_TEST

Fix whitespace

- remove trailing whitespace
- remove double blank lines
- remove blank lines at end of file

Fix licenses

Test range max against defined number

Check error descriptions during untyped tests

- This test will pass on current master, which always uses buffered
machine registers for syscalls

- It will fail if syscall_stub_gen.py is run without --buffer, as
the error descriptions are lost on the way through [1]

- It will pass once more when seL4/seL4#45 lands :-)

[1] http://sel4.systems/pipermail/devel/2016-October/001079.html

Remove references to experimental branch (stable)

Remove 'args' parameter to test cases.

This commit removes the state parameter to test cases, which was unused in all
tests. In three years, no test has required this parameter. I think it's time
to ditch this dead weight. It can be reintroduced if necessary later.

Note that this change is interdependent with changes to libsel4test.

bandaid to get sel4test to output the correct number of tests passing

Release snapshot