BackupChain query using @@servername issue

[alexirion10]

In PR https://github.com/factset/AgDatabaseMove/pull/75/files using @ServerName prevents a BackupChain from being retrieved after being restored from a backup on another server

[AdityaNPL]

Will take a look, maybe we can parameterise the filter to be customisable.
Or maybe there is another way to achieve the same result we are after without @@servername

Will update once I have some more info

[AdityaNPL]

This was reverted and fixed by matching the LSNs instead:
#103