Merge pull request #383 from stankovski/hydra-update

Changes resulting from Hydra update
Added basic implementation to TokenCloudCredentials without support for token renewal.
Added support to refresh credentials in CloudCredentials
Changed RefreshServiceClient to be async to support long running refresh operations
Adding Generated SQL Database management libraries
Merge remote-tracking branch 'upstream/dev' into dev

Conflicts:
	src/SqlManagement/Generated/DatabaseCopyOperations.cs
Updating Service Bus specification.
Updating NuGet versions
Merge pull request #386 from jeffwilcox/dev-sb

Service Bus documentation updates
Merge pull request #387 from jeffwilcox/dev

Updating NuGet versions
Rolled back RefreshServiceClient method
Added ability to specify token type
Added null check
Removed extra new line
Updates based on the code review
Fixed copy-paste errors in comments
Merge branch 'dev' into token-credentials
Merge pull request #385 from stankovski/token-credentials

Basic implementation of TokenCloudCredentials
Updating nuget package versions for hydra generator
Updating Common library NuGet package information