Extended PhaseI Pixel Layers geometry scenario.

* Extended PhaseI Pixel Layers geometry scenario as defined by FastSim group
* Transient geometry label for cmsDriver is ExtendedPhaseIPixelLayers
* DB payload geometry label is ExtendedPhaseIPixelLayers
* Persistent geometry label for cmsDriver is DBExtendedPhaseIPixelLayers

Note: it should be taken to both 612_SLHC7 and 70x