Really fix the lower bound for session handles (session_max) to 1024 (upper bound is 8192).

src/riak_kv_wterl_backend.erl

@@ -378,11 +378,14 @@ max_sessions(Config) ->
     Est = RingSize * erlang:system_info(schedulers),
     case Est > 8192  of
         true ->
+	    8192;
+        false ->
 	    case Est < 1024 of
-		true -> 1024;
-		false -> 8192
-	    end;
-        false -> Est
+		true ->
+		    1024;
+		false ->
+		    Est
+	    end
     end.
 
 %% @private