metrics_initialized shall be reset in deinit function.
This is currently causing issue in running metrics_autotest
multiple times.
Fixes: 07c1b6925b65 ("telemetry: invert dependency on metrics library")
Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Acked-by: David Marchand <david.marchand@redhat.com>