[Bitcore-Node] Fix Unspent Coins with spentTxid

[escottalexander]

This PR adds a new migration script that checks all unspent coins that have a spentTxid and sets the spentTxid to an empty string. It also checks to verify that the coin is unspent before updating.

This script is mostly a copy of the original (now renamed) migration script.

Location of changes are:

• (99) Where the stream query is defined
• (136) Catch for when a coin is actually spent - updated to log any records that catch here as this is not expected
• (179) Write to file if any "actually spent" coins showed up from our query

Also updated the original migration script to match a uniform naming scheme for the migration scripts and to set the spentTxid when it updates a record. This would be useful to anyone who runs the script in the future though unnecessary if the second migration script is used.

[u353y]

[u353y]

Details

Trezor