Get primary name after waiting for redeploy

Author: jmckulk

testing/kuttl/e2e/exporter/13--check-exporter.yaml

@@ -4,17 +4,17 @@ kind: TestStep
 commands:
   - script: |
       set -e
+      # Wait some time so that the instance pod is redeployed
+      # TODO: automate this wait
+      sleep 30
+      
       PRIMARY=$(
         kubectl get pod --namespace "${NAMESPACE}" \
           --output name --selector '
             postgres-operator.crunchydata.com/cluster=exporter-tls,
             postgres-operator.crunchydata.com/role=master'
       )
 
-      # Wait some time so that the instance pod is redeployed
-      # TODO: automate this wait
-      sleep 30
-
       {
         METRICS=$(kubectl exec --namespace "${NAMESPACE}" \
           "${PRIMARY}" -c exporter \