fix missing deposit notes #9
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The coordinator unproperly handled malicious deposit transaction.
the transactions are same input data from different accounts. that makes the coordinator rewrite deposit note 'queuedAt'
for example, the coordinator record a note with 'queuedAt: 100' for 'A' deposit transaction.
and the coordinator record again the note with 'queuedAt: 101' for the malicious deposit transaction 'B' has same input data of 'A'
then coordinator mark invalid the block which has 'A' deposit note due to cannot finding deposit note with 'queuedAt: 100'.