CI: ran-build image on acamas

OC selected dedale, which is a real-time node. There are two issues:
- build jobs received a KILL signal
- it would not play nicely with real-time loads
We therefore hardcode another node.

openshift/ran-base-bc.yaml

@@ -26,6 +26,8 @@ metadata:
   name: "ran-base"
 spec:
     runPolicy: "Serial"
+    nodeSelector:
+        kubernetes.io/hostname: acamas
     source:
         type: "Binary"
         secrets: