CQBE-0: modified getcoredumps.py to be used in testrunner itself and collect logs in the test log directory
output is here: https://friendpaste.com/2aAAhKpXaZlO9j140Siegj

Change-Id: I0d283ae4c870478fc14546330bd4c0ac2b376bad
Reviewed-on: http://review.couchbase.org/37320
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>