Analysis Services Connector support for trusted subsystem security model

[mny1]

The Power BI Analysis Services Connector should support the trusted sub system security model. It can be used to allow an application to connect to the SSAS database using a specified account. In the case with the connector, it should be possible to configure a static username and password that has read access to the database. Usernames should not be injected in the connection string. This scenario will add support for SSAS instance that are hosted on a server that is not domain joined.