[#32] node: Always close general components after testing

It will prevent test fails with `-race` flag on components that have
background processes and make some actions on test framework.

Signed-off-by: Pavel Karpy <p.karpy@yadro.com>

pkg/local_object_storage/internal/storagetest/storage.go

@@ -106,6 +106,7 @@ func TestSetMode(t *testing.T, cons Constructor, m mode.Mode) {
 		require.NoError(t, s.Open(false))
 		require.NoError(t, s.Init())
 		require.NoError(t, s.SetMode(m))
+		require.NoError(t, s.Close())
 	})
 }