Power BI exercise Task 2 - Open instead of Create

[manasvin]

Issue submitted as referred by Spektra Support and direction that we submit it here

It may be better to allow users to open the existing report that which is published by Power BI Desktop steps (task 1). Creating a new one seems odds to users who are currently quite used to or familiar with, although illustrating that a new one can be created by simply pointing out the option is useful.

If the Auth creds are sorted out beforehand (as submitted on separate issue) then the opening the existing report would save time too

This would greatly improve the Power BI integration experience, esp for currently proficient Power BI report developers