Fix for NMS-6141 - Set default log level to WARN (like 1.10)
Merge remote-tracking branch 'origin/1.12' into space/13.2

Conflicts:
	opennms-base-assembly/src/main/filtered/etc/log4j.properties
implement mock reload()
fix merge error
Added focus node list to the SavedHistory. Undid change where history was cleaned up
after each save since this breaks the back button history function.
Fixed state transitions of the Auto Refresh and Status selector operations.
Cleaned up the focus node history code a bit.
Merge commit 'd110b5f98d8dfb71570f79ffb07c75e8dd4023b0'

Conflicts:
	opennms-services/src/main/java/org/opennms/netmgt/collectd/Collectd.java