Fix flaky TestCollector
(cherry picked from commit 1c774931a995d51af6118b64280280809e51338a)
For ENG-5650, specify a path for the hs_err_pid file in the voltdbroot so the log collector can find it
(cherry picked from commit 2f86f7697fb64a6180db6ad20321498f5b1d4d6f)