Fix compilation warning in TFGTriggeredScaler

Change-Id: Ie1d4ae62b09049dc00f84fbe2ed81dc33b939612
Fix warning in DummyHardwareTriggerableSimpleDetector

Change-Id: Ib662783c35488f149b2c594f1fc8109d293dce08
Fix compilation warnings in CoordinatedScannableGroup

Change-Id: I9d76f075b0fe9f522c8334e1a086c00925f3215f