Travis: Initiating build for commit '6dfe445dfb50271049e89fa46f81466a7521d249' on branch '6075_tracker_queue_ondemand': this improves the speed of loadingTrackerPlugins and reduces disk reads a lot which is useful when bulk tracking is used as we can now reuse plugin instances and no longer have to recreate the plugin instance and load and parse plugin.json etc. On my instance it is about 20ms per tracker request. Also fixed a bug in isPluginActivated