CBQE-0 fix cli collect log path in windows, unix and mac

Change-Id: I0bbdc4f33b5b3b7c7383248d417ec46ada58b9b2
Reviewed-on: http://review.couchbase.org/44002
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>