Fix samples-ios cron job

[IldarAbdullin-okta]

• Removed OIDC e2e tests from sample app. It is not required as e2e tests are running in OIDC and AuthN repos. No need to duplicate tests
• Travis CI will build all available sample apps with latest SDK versions
• Travis CI will build additional CarthageTest project with the latest OIDC and AuthN SDKs to make sure that Carthage functionality is not broken
• Travis CI will build additional ObjcTest project with the latest OIDC SDK to make sure that SDK can be successfully build/used in pure ObjC project