[KYUUBI #890] Fix minikube test

<!--
Thanks for sending a pull request!

Here are some tips for you:
  1. If this is your first time, please read our contributor guidelines: https://kyuubi.readthedocs.io/en/latest/community/contributions.html
  2. If the PR is related to an issue in https://github.com/apache/incubator-kyuubi/issues, add '[KYUUBI #XXXX]' in your PR title, e.g., '[KYUUBI #XXXX] Your PR title ...'.
  3. If the PR is unfinished, add '[WIP]' in your PR title, e.g., '[WIP][KYUUBI #XXXX] Your PR title ...'.
-->

### _Why are the changes needed?_
<!--
Please clarify why the changes are needed. For instance,
  1. If you add a feature, you can talk about the use case of it.
  2. If you fix a bug, you can clarify why it is a bug.
-->
change the k8s-it serviceaccount to kyuubi instead of default

### _How was this patch tested?_
Pass CI

Closes #890 from ulysses-you/fix-minikube-test.

Closes #890

5844c482 [ulysses-you] kyuubi
16192d6e [ulysses-you] test

Authored-by: ulysses-you <ulyssesyou18@gmail.com>
Signed-off-by: ulysses-you <ulyssesyou18@gmail.com>

.github/workflows/master.yml

@@ -154,7 +154,7 @@ jobs:
       - name: kubectl pre-check
         run: |
           kubectl get serviceaccount
-          kubectl create serviceaccount default
+          kubectl create serviceaccount kyuubi
           kubectl get serviceaccount
       - name: start kyuubi
         run: kubectl apply -f kubernetes/integration-tests/test-k8s.yaml

kubernetes/integration-tests/test-k8s.yaml

@@ -22,6 +22,7 @@ metadata:
   labels:
     kyuubi-role: KYUUBI_SERVER
 spec:
+  serviceAccountName: kyuubi
   containers:
     - name: kyuubi-server
       # TODO: replace this with the official repo