Temporarily go back to using v1 of the Conditions DB

Using V2 of the conditions DB causes hundreds of relval tests to fail in the ROOT6 IB. This pull request simply reverts the default in the ROOT6 IB back to V1 for the time being, until the problem can be fixed.  This reversion makes the IB more useful for other purposes in the interim.  Please merge this request promptly unless there are issues.