am 5f9aa938: Merge change 4334 into donut

Merge commit '5f9aa93881e796a66c2a625ced1ee89292c2b570'

* commit '5f9aa93881e796a66c2a625ced1ee89292c2b570':
  Modified Thread to copy the context class loader from parent to child threads. Re-enabled test that covers this. Removed security-related code from test since it was invalid (the security check