Zuul v3: Stop using citycloud-sto2
Current connection issues are causing failures, and Zuul v3 cannot
detect them in a timely manner.  Stop using sto2 until we have
better detection in Zuul or the problem abates.
@@ -207,7 +207,7 @@ providers:
config-drive: true
pools:
- name: main
- max-servers: 10
+ max-servers: 0
labels:
- name: centos-7
min-ram: 8000
