* Rewrite ISIS Adjacency discovery/polling
hopefully much faster now, do most work in discovery and just check up/down in poller.
* unused variable
* Implement option for OS override
* fix an incorrect typehint
* test data
* work around stupid migration name
* update schema
* better handling for the on-demand discovery
* more detailed phpdoc
* fix when adjacency is not found
* don't clear out data when adjacency goes away
* Adjust nullable fields
* fixes
* fix class name
* correct migration
* fix bug causing adjacency data to always be blank
* port popups for port links
* isisISAdjState does not need to be nullable
* remove extra space
* default off
* If port is missing return $text
* update schema
* Cleanup old components
* correc copy paste error