Also add some debug log lines for this test, because it doesn't make sense
for the allocation to be complete yet a task in the allocation to be not
started yet, which is what the test failures are implying.
This PR adds pid_mode and ipc_mode options to the exec and java task
driver config options. By default these will defer to the default_pid_mode
and default_ipc_mode agent plugin options created in #9969. Setting
these values to "host" mode disables isolation for the task. Doing so
is not recommended, but may be necessary to support legacy job configurations.
Closes#9970
