Default CQA Test Mode

I've not seen this mentioned anywhere so here goes. I have a Retail GB Moto G (from phones4u), with bootloader unlocked via Motorola website.

When I connect my Moto G to my computer via USB cable from a powered off state it instantly boots into android but with no mobile signal.

It is running something called CommServer and I have a "Motorola USB Networking Driver" in windows device manager.

Tapping on Commserver notification takes me into the CQATest app. Where I can run a bunch of diagnostic tests on screen, camera, sensors, led etc.

Is this normal, how can it be disabled so that I can charge the phone from USB without it powering on?
Devices: Moto G, Nexus 7 (2012), MK808B, MK802, True Beyond Tab 3G