INDY-1173: fix condition for datetime=None for command restart
INDY-1173: fix condition for datetime=None for command restart

Signed-off-by: toktar <693efcc3eefc70dd401303f85580b26042b61007@dsr-corporation.com>

spivachuk/sovrin-node,spivachuk/sovrin-node,spivachuk/sovrin-node,spivachuk/sovrin-node