* Updated Database->get_host_from_uuid() to cache results.
* Fixed a bug in Database->get_storage_group_data where a DELETE wasn't deleting from the history schema as well.
* In Database->resync_databases(), references to the old 'host_uuid' that we used to use to resync just the local host's data was removed. Added also a check where two or more entries in a given history schema had the same modified_date and, when found, the newest entry is preserved and the rest are deleted. Before this, a resync where two+ records had the same modified_time would only sync the last record, leaving a mismatch in history schema entries triggering repeated resyncs.
* Fixed a bug in Email->send_alerts() where the 'alerts' table was being updated without a modified_date being set.
* Fixed a bug in System->test_ipmi() where the 'hosts' table was being updated without a modified_date being set.
* Updated scan-network to clear up old deleted ip_addresses, bonds and bridges. Also fixed bugs where public schema records were being deleted without history records being deleted.
* Updated anvil-update-states to fix bugs where DELETEs were happening without setting the modified_date.
Signed-off-by: Digimer <digimer@alteeve.ca>