Don't store connection details in connection

These connection options are only needed when establishing a new connection
and they are retrieved from config at that time.

This ensures that sensitive information is not logged when
a snowflex connection crashes.

fixes DAPPS-2084

lib/snowflex/connection.ex

@@ -31,8 +31,7 @@ defmodule Snowflex.Connection do
 
     state = %__MODULE__{
       pid: pid,
-      status: :idle,
-      conn_opts: connection_args
+      status: :idle
     }
 
     {:ok, state}