Update dev to match Microsoft/vscode-docker/master

* Added Azure Credentials Manager Singleton
* Added getResourceManagementClient

Added try catch loop and awaited for resource group list again to check for duplicates with ResourceManagementClient

* Added Azure Credentials Manager Singleton

* Small Style Fixes

* Further Style fixes, added getResourceManagementClient

* Lazy Initialization Patches

-Changed order of questions asked to user for better UX (location of new res group & location of new registry)
-Placeholder of location is display name view

Master update

Create Registry

* first fully functional version of delete through input bar AND right click

* refactored code to make it prettier!

* comments

* comments, added subscription function

* fixed to style guide

* style fixes, refactoring

* delete image after reviews

put my functions from azureCredentialsManager into two new files: utils/azure/acrTools.ts, and commands/utils/quick-pick-azure.ts

Edited code based on Esteban's and Bin's reviews

* One last little change to delete image

* moved repository, azureimage, and getsubscriptions to the correct places within deleteImage

* changes from PR reviews on delete image

* fixed authentication issue, got rid of azureAccount property for repository and image

**on constructor for repository, azurecredentialsmanager was being recreated and thus couldn't find the azureAccount. For this reason, I got rid of the azureAccount property of the classes Repository and AzureImage. This bug may lead to future problems (Esteban and I couldn't see why it was happening)

* minor fixes deleteImage

* delete a parentheses

Master merge maintain fork updated

* Merge fixes to acquire latest telemetry items

* Updated to master AzureUtilityManager

* tslint updates, transfered from old branch

* updated icon

* Addressed PR comments- mostly styling/code efficiency

* Changed url to aka.ms link

* changed Error window to Info message for no build tasks in your registry

* Changed default sku and unified parsing resource group into a new method, getResourceGroup in acrTools.ts

* Changed build task icon

* deleteRepo moved over to branch off dev

* Got rid of unnecessary code, fully functioning!

* deleteRepo moved over to branch off dev

* Got rid of unnecessary code, fully functioning!

* spacing

* final commit

* Cleaned code

* Added Telemetry

Delete azure registry functionality added

Delete azure registry moved to branch off dev

Reorganized stye

Master dev merge

This reverts commit 126c01e.

…anagement

…ck picks

…ixes

…cally