Add virtualbmc_port field to scale config

This config was not included when the field was added to others.
Adding this should bring back up the master periodic scale job
on ci.centos

Change-Id: I3dd8383b6fea7337ae0fedf96d23949db74161f1

config/general_config/scale_compute.yml

@@ -12,12 +12,15 @@ control_vcpu: 4
 overcloud_nodes:
   - name: control_0
     flavor: control
+    virtualbmc_port: 6230
 
   - name: compute_0
     flavor: compute
+    virtualbmc_port: 6231
 
   - name: compute_1
     flavor: compute
+    virtualbmc_port: 6232
 
 # If `run_tempest` is `true`, run tempests tests, otherwise do not
 # run them.