Rename HTTPConnection and HTTPServer classes to fix duplication warnings

[hoolrory]

GTLFramework has HTTPConnection and HTTPServer classes, and we've had these warnings for years:

This fix is kind of stupid but:

1. The base repo is dead, so we don't have to worry about rebasing this
2. This repo is only used for Fuse integration, which will probably be killed off in the future

objc[62179]: Class HTTPConnection is implemented in both /Users/r.hool/Library/Developer/Xcode/DerivedData/Camtasia-gmcsxsmfatolpwbelnnkuemcmiqt/Build/Products/Debug/Camtasia.app/Contents/Frameworks/GTL.framework/Versions/A/GTL (0x106ca2658) and /Users/r.hool/Library/Developer/Xcode/DerivedData/Camtasia-gmcsxsmfatolpwbelnnkuemcmiqt/Build/Products/Debug/Camtasia.app/Contents/Frameworks/CocoaHTTPServer.framework/Versions/A/CocoaHTTPServer (0x1053b7158). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed.
objc[62179]: Class HTTPServer is implemented in both /Users/r.hool/Library/Developer/Xcode/DerivedData/Camtasia-gmcsxsmfatolpwbelnnkuemcmiqt/Build/Products/Debug/Camtasia.app/Contents/Frameworks/GTL.framework/Versions/A/GTL (0x106ca2630) and /Users/r.hool/Library/Developer/Xcode/DerivedData/Camtasia-gmcsxsmfatolpwbelnnkuemcmiqt/Build/Products/Debug/Camtasia.app/Contents/Frameworks/CocoaHTTPServer.framework/Versions/A/CocoaHTTPServer (0x1053b7388). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed.