Detect and identify Xcode 7 simulators

[jmoody]

Motivation

Touch coordinates for iPhone 6* were incorrect because the server was not correctly detecting iPhone 6 devices.

Fixes

• Xcode 7 GM touch coordinates are off on iPhone 6 and 6+ Xcode 7 GM touch coordinates are off on iPhone 6 and 6+ #238
• add ability to get device name from server add ability to get device name from server #228
• Xcode 6 removed 2 simulator environment variables Xcode 6 removed 2 simulator environment variables #240

Progress On

• Xcode 7 GM: failing unit tests Xcode 7 GM: failing WebView test on iOS 9 #226

This is a HUGE commit. Changes to LPVersionRoute are backward compatible with gem < 0.16.2

• Removed a bunch of legacy code (back to iOS 4/Xcode 3)
• LPDevice takes responsibility for all things device related.
• LPTouchUtils device/form factor code replaced with calls to LPDevice
• Fixes Xcode 7 failing unit tests that were trivially failing
• Disables failing WebView units for iOS 9 (tests are probably bad).
• Force XCTest to run on iPhone 5s Simulators
• Add device_name to key LPVersionRoute
• Deprecate some truly wonky key/value pairs in LPVersionRoute
• Add a bunch of helpful key/value pairs to LPVersionRoute
• Add LPProcessInfoRoute to report [[NSProcessInfo processInfo] environment]

ATTN @krukow @sapieneptus @john7doe @rasmuskl

https://github.com/xamarin/test-cloud-frontend/issues/1711