Hide debugging printouts regarding LED assertion

Change the printouts from cout to log<level::DEBUG>
The rest of led manager already logs to phosphor-logging
and only these assertion/deassertion messages were
going to cout.

Change-Id: I9b284221592ac6b48d749acd2f3dfe2d07d4e454
Signed-off-by: Alexander Soldatov <a.soldatov@yadro.com>
Signed-off-by: Alexander Amelkin <a.amelkin@yadro.com>
1 file changed