Have database auto assign valueid

[ptomasula]

Related to PR #674

The production code is presently calling a postgres sequence to assign valueid as part of the insert query against timeseriesresultvalue. PR #674 eliminates that call (assuming the database will provide a default for that value); However, the database was not configured to automatically assign this id if not provided.

I have made the adjustments on the testing and staging databases. This issue is to remind us that we also need make this change to the production database prior to release.