add FreedomPop APN for 4G/LTE

Change-Id: I912969cfaf5f9787132d24848891da59642f854f
apns-conf: Fix Digi MMS port.

Change-Id: Id6c9c4916b0378f6f2c99d023f7dd8237d26b47a
added Sprint Test APNs

Change-Id: I0a276b5a4dd2a6fc071a4f9330bafd2cafb3405a
add apn for ziggo & modify videotron for LTE
per CYAN-5248 & CYAN-5295 respectively

Change-Id: I0899ea45138f46f0a058a26e00b429912376a361