Merge remote-tracking branch 'origin/2.9'

* origin/2.9:
  docs: add hm2_pktuart.3 to gitignore
  mb2hal tests: ignore QUIT signal delivery time
  mb2hal test: remove signal timing requirement
  mb2hal tests: ignore comp id in tests
  mb2hal: wait for threads to stop before deallocating the memory they're using
  mb2hal tests: accept any comp id

Author: SebKuzminsky