Set deploywait_timeout via localrc option
Set deploywait_timeout via localrc option

Currently a hardcoded value is used for the DEPLOYWAIT timeout in
tempest. The patch in review 269249 adds a config option to use
instead of this hardcoded value. This patch allows the value to be
set via the BUILD_TIMEOUT variable.

Change-Id: Id79014fd6e07f93029111f6c28e3537e2e39be9f
Related-Bug: 1526466

bswartz/devstack,noironetworks/devstack,openstack-dev/devstack,bswartz/devstack,nawawi/openstack,dtroyer/devstack,group-policy/devstack,dtroyer/devstack,noironetworks/devstack,group-policy/devstack,openstack-dev/devstack,richliu/devstack,nawawi/openstack,richliu/devstack