MOBSDK-597: Remove duplicate file references from project file
Updated ObjectiveCMIS library: Untrusted SSL support moved to a separate, specific, Authentication Provider
Update SDK to match updated untrusted SSL handling in ObjectiveCMIS library.
- We no longer need the unintuitive "useTrustedSSLServer" flag passed around
SDK Samples brought up-to-date with latest SDK changes.
SDK Samples and HelloRepo code tidying.
- SDK Sample app exposes an "SSL validation" flag in the UI