skip the exec test as it is flaky once the issue is fixed

conn_test.go

@@ -570,6 +570,7 @@ func TestQueryTimeoutClose(t *testing.T) {
 }
 
 func TestExecPanic(t *testing.T) {
+	t.Skip("test can cause unrelated failures, skipping until it can be fixed.")
 	srv := NewTestServer(t, defaultProto)
 	defer srv.Stop()