Description of problem:
The UID limits in node.conf are not enforced. This leads to confusing behaviour.
Version-Release number of selected component (if applicable):
Occasionally in production, but easy to reproduce in dev by requesting a high UID.
Steps to Reproduce:
1. use oo-app-create and specify a high UID.
Refused to create.
The production district code has a limit that's 1000 higher than the nodes. Harmonize them as part of this bug.
The port proxy allocator is based on the UID range and we've already had bugs with how the ranges conflict.
Converted to a user story to cover the long standing technical debt.