tests: update L1/L2 CNode creation tests and add harness test

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

harness: cleanup tests to not override is_finished() where possible

If is_finished() cannot be converted into get_finish_string(), i.e.
is_finished() is a condition that depends on multiple output lines make sure
we call super().is_finished(line) on every line so that we catch Assertion
errors etc. that are checked for in TestCommon.is_finished().

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

harness: fix core ranges for memtest_multicore and retype_multi.

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

harness: retype_test: fix multicore retype test to only put binary in multiboot once

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

T191: harness: add quiet mode to retype test and use it in harness.capops_retype_multi

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

T266: harness: fix root cnode resizing harness test class name

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

T258: remove stale comments and commented out code and rename retype tests

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

T266: add test for resizing root cnode and fix minor issues in two-level slot allocator

Closes T266.

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

T191: x86_64: refactor retype2 back to retype

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

T191: write multi retype test and add test_retype2 in platforms/Hakefile

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

T191: add testing for new retype code; not complete

Currently only does a single retype of one 4k block from a 2M block.

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>