fix db-path for diag-create-missing-minters

[jsjiang]

@rushirajnenuji Hi Rushiraji,
This is a copy of the diag-create-missing-minters.py script with the 2nd parameter shoulder_str removed from the impl.nog.minter.create_minter_database function.

% diff  diag-create-missing-minters-tmp-fix.py  diag-create-missing-minters.py        
106c106
<                 impl.nog.minter.create_minter_database(s.prefix)
---
>                 impl.nog.minter.create_minter_database(s.prefix, shoulder_str)

Please review.

Thank you

Jing