Recode instance loading/caching
Fix: add new instance only if included in bluebird.cfg
Fix: summary tables not populating trans_ip
Fix: array_value() parameter order, uncaught exceptions on PDO, INSTANCE_CACHE normalization
Added default row to apache_cron_runs schema, generalized definer for view all_requests
Fix: incorrect instance_id seed value
Improved logging.  Simplified some config parameters.
Converted a few remaining echo statements into log_() calls.
Fix: failed to detect invalid instances not already in cache
Merge branch 'dev' into prod