<bugfix>Fix OPM import</bugfix> <ticket>#617</ticket>
<bugfix>Fix OPM import</bugfix>
<ticket>#617</ticket>

Import OPM classes from the current domain instead of a fixed version.

db/services/opm.py:
  - change import from db.versions.v1_0_0.domain to db.domain
  - run: move DAOList import inside of this method

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