Removing externally mounted kubeconfig from bbsim-sadis-server and provide authorization via ClusterRole

Change-Id: Ia5776a58a8c7dee652a54d916a7f7256defd9991
diff --git a/bbsim-sadis-server/values.yaml b/bbsim-sadis-server/values.yaml
index a538604..6cd326f 100644
--- a/bbsim-sadis-server/values.yaml
+++ b/bbsim-sadis-server/values.yaml
@@ -25,7 +25,7 @@
 
 bbsim_sadis_port: 50074
 
-serviceAccountName: ~
+serviceAccountName: bbsim-sadis-server
 
 images:
   bbsim_sadis_server: