gh-401 Reference data caching is no longer user sensitive
gh-401 Reference data caching is no longer user sensitive

Reference data was being cached per user to ensure a user centric view
of reference data was being used. This required more memory so now
reference data is built in the context of the internal processing user
and then filtered during processing by user access to streams.

gchq/stroom,gchq/stroom,gchq/stroom,gchq/stroom,gchq/stroom,gchq/stroom