Add openstack_functions.py to zuul-dev.o.o
Add openstack_functions.py to zuul-dev.o.o

The zuul.o.o layout.yaml file references an openstack_functions.py
This change duplicates that for zuul-dev.o.o.  To do that zuul-dev.o.o
needs it's own openstack_functions.py file.

Change-Id: Ifb8bb921545f4ab4557e02c676c85ced20687ba3

dongwenjuan/project-config,anbangr/osci-project-config,citrix-openstack/project-config,openstack-infra/project-config,coolsvap/project-config,Tesora/tesora-project-config,noorul/os-project-config,noorul/os-project-config,Tesora/tesora-project-config,dongwenjuan/project-config,coolsvap/project-config,open-switch/infra_project-config,open-switch/infra_project-config,citrix-openstack/project-config,openstack-infra/project-config,anbangr/osci-project-config