Do not set service link env variables

Kubernetes set environment variables in pods to help with service
discovery. This is a problem when we have thousands of builds.
And we don't need them (since there is no service communication,
and we have DNS in the cluster anyway).

src/runboat/kubefiles/cleanup.yaml

@@ -10,6 +10,7 @@ spec:
       labels:
         runboat/job-kind: cleanup
     spec:
+      enableServiceLinks: false
       containers:
         - name: cleanup
           image: postgres

src/runboat/kubefiles/deployment.yaml

@@ -18,6 +18,7 @@ spec:
     spec:
       # let Odoo stop gracefully to disconnect from postgres
       terminationGracePeriodSeconds: 10
+      enableServiceLinks: false
       containers:
         - name: odoo
           image: odoo

src/runboat/kubefiles/initialize.yaml

@@ -10,6 +10,7 @@ spec:
       labels:
         runboat/job-kind: initialize
     spec:
+      enableServiceLinks: false
       containers:
         - name: initalize
           image: odoo