Tests: Cleanup junk in test/common/dbserver
Docs: Explicitly specify field order.
Bamboo/dclass: Implement comparison operator for Field based on field_id
Tests: Have dbserver tests expect fields ordered by field_id
DBOperation: Use sorted sets and maps to efficiently handle ordering of fields.
Tests: Update stateserver test for defined ordering
StateServer: Update stateserver for ordering rules.
Tests: Update dbss test for defined ordering
Bugfix: Add missing return in field comparisons.
Bugfix: DBSS incorrectly orders set_fields to Database.

Using FieldValues instead of unordered map in DBSS handle_set_fields.
Merge pull request #256 from Astron/bugfix/field-ordering

Bugfix: Fields should be relayed ordered by field_id