- Before that change on each requests 4x we loaded plugins for authentication, this hit
many caches, db invalidation context and loaded the plugins logic each time. This was a heavy performance hit
for SVN and other backends as they needed to load that plugins many many times
- Since Authentication plugins almost never change, we'll not store the plugins listed for authentication into
the authnregistry for each process
- For AuthPlugins settings we now also flush plugins settings, and authnregistry cached plugins
- allows limiting the usage of builtin auth to HTTP only (so force usage of tokens)
- allows migration to something like saml keeping only super-admin for login.
Ensuring now that we always disable the vcsserver auto start for the test suite,
since the test suite bootstraps its own vcsserver process.
Also enhanced TestINI.
