Bay_create_timeout default is 0 and means that magnum create bay
without timeout. But heat create stack with timeout absolutely.
So it is impossible to create bay without timeout. And I had send
a patch which allow heat to create stack without timeout, but the
core of heat did not agree with it.
The patch is: https://review.openstack.org/#/c/334138/
Change-Id: Iebc9915dcf2894a2dbed912244a2c7c308b4d9d7
Closes-bug: #1590636