ConfigurationMonitor calls reset too often

Description

ConfigurationMonitor resets the load balanced environments at startup causing the rest of the lb machines to toggle the state of ab which then triggers another reset from each lb node, sending another message out to the machines causing another reset message, and so on.

Additionally this configuration monitor is setup to poll every 500msec. There is no reason we need to poll so often. Change to 1 minute

Also added app setting configuration values to override defaults:
EPiServer:Marketing:Testing:TestMonitorSeconds
EPiServer:Marketing:Testing:ConfigurationMonitorSeconds