Fixed typo for DID
Fixed typo for DID

Signed-off-by: Kenji Siu <3ae4a282ff208b6d45a2bf53be412981180f9dde@hk1.ibm.com>

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