Add krb5 server packages

Author: aiudirog

.github/workflows/tests.yml

@@ -37,7 +37,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - name: Setup Build Tools
-        run: sudo apt-get install -y krb5-kdc libkrb5-dev
+        run: sudo apt-get install -y libkrb5-dev krb5-user krb5-kdc krb5-admin-server krb5-multidev
       - name: Set Up Python
         uses: actions/setup-python@v1
         with: