Additional test fixes for HDInsight and Managed Cache
Merge pull request #2847 from ogail/profile

Merge latest from public dev branch
Converted scenario tests to xunit
Excluded websites tests
Excluded failing automation unit tests and fixed ADAL
Converted AccessTokenCredential to use Guid instead of string
Merge pull request #2855 from stankovski/refactoring

Additional test fixes for HDInsight, Managed Cache, Automation, Traffic Manager, and Scheduler tests