fixing #5544 test_runner swallows server crashes
fixing #5544 test_runner swallows server crashes

over-the-virtual-shoulder by @danielmewes

robertjpayne/rethinkdb,bpradipt/rethinkdb,bchavez/rethinkdb,eliangidoni/rethinkdb,eliangidoni/rethinkdb,grandquista/rethinkdb,bpradipt/rethinkdb,catroot/rethinkdb,robertjpayne/rethinkdb,catroot/rethinkdb,eliangidoni/rethinkdb,eliangidoni/rethinkdb,bchavez/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,catroot/rethinkdb,jmptrader/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,robertjpayne/rethinkdb,bpradipt/rethinkdb,eliangidoni/rethinkdb,mbroadst/rethinkdb,robertjpayne/rethinkdb,bpradipt/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,catroot/rethinkdb,mbroadst/rethinkdb,JackieXie168/rethinkdb,bchavez/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,jmptrader/rethinkdb,jmptrader/rethinkdb,bchavez/rethinkdb,bpradipt/rethinkdb,JackieXie168/rethinkdb,mbroadst/rethinkdb,grandquista/rethinkdb,catroot/rethinkdb,bpradipt/rethinkdb,robertjpayne/rethinkdb,mbroadst/rethinkdb,robertjpayne/rethinkdb,bchavez/rethinkdb,JackieXie168/rethinkdb,catroot/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,mbroadst/rethinkdb,JackieXie168/rethinkdb,bchavez/rethinkdb,grandquista/rethinkdb,JackieXie168/rethinkdb,catroot/rethinkdb,mbroadst/rethinkdb,JackieXie168/rethinkdb,bpradipt/rethinkdb,JackieXie168/rethinkdb,jmptrader/rethinkdb,bchavez/rethinkdb,bchavez/rethinkdb,jmptrader/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,bpradipt/rethinkdb,catroot/rethinkdb,JackieXie168/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb