Enable the use of Azure Logic Apps Managed Connectors

[msfussell]

Ability to use the Azure managed connectors (currently only the built-in connectors and actions are available).
Managed connectors provide triggers and actions for accessing cloud services, on-premises systems, including Office 365, Azure Blob Storage, SQL Server, Dynamics 365, Salesforce, SharePoint, and more.
https://docs.microsoft.com/en-us/azure/connectors/apis-list

[artursouza]

We should eventually move this to contrib. Keeping it here for context within the rest of the workflow issues.