Merge pull request dotnet#31039 from AfsanehR/AccessToken2.2

[release/2.2] Added AAD Authentication using Access Token

.NET Core 2.1.3

.NET Core 2.1.2

.NET Core 2.0.8

.NET Core 1.1.9

.NET Core 1.0.12

.NET Core 2.1.1

.NET Core 2.1.0

.NET Core 2.1 preview2

.NET Core 2.1 rc1