test: update test-run (hang worker fix)

This update fixes a sporadic problem with hanging test-run workers. The
reason is an incorrect garbage collector handler. See [1] for details.

This is not the last test-run problem, which leads to a hang worker: at
least there is known problem [2].

[1]: https://github.com/tarantool/test-run/pull/275
[2]: https://github.com/tarantool/test-run/issues/276

Part of tarantool/tarantool-qa#96

test-run @ cb5adde9

-Subproject commit 59417412699c46d6e498301794cc3c3d6298d255
+Subproject commit cb5adde9d399bdf478082a061739b78647752c85