ipa-kdb: test kadmin.local getprincs command

Fixes: https://pagure.io/freeipa/issue/8490
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>

ipatests/test_ipaserver/test_kadmin.py

@@ -123,3 +123,9 @@ class TestKadmin:
             installutils.create_keytab,
             keytab,
             service)
+
+    def test_getprincs(self):
+        """
+        tests that kadmin.local getprincs command returns a list of principals
+        """
+        self.assert_success(installutils.kadmin, 'getprincs')