Merge pull request #1374 from MSOpenTech/dev

Added support for VM extensions, static IPs, specification of arbitrary vm sizes and reserved IPs.
changing output to the right formatting
Merge pull request #1377 from hovsepm/outputformat

[RBAC][XPLAT] --json output of active directory query command is not right
Merge branch 'dev' of https://github.com/Azure/azure-sdk-tools-xplat into dev