The new driver uses Azure Resource Manager APIs and offers a lot
more functionality compared to the old Azure driver. It is also
easier to authenticate and does not require user to create and place
certificate files. It only has a single required argument.
This is a breaking change: The new driver cannot work with machines
created with the older Azure driver and vice versa (as the APIs are
entirely different and resources are not shared between old/new azure
APIs).
The new driver addresses many issues about the azure driver reported
so far.
This resolves#2742, resolves#1368, resolves#1142, resolves#2236,
resolves#2408, resolves#1126, resolves#774.
Signed-off-by: Ahmet Alp Balkan <ahmetalpbalkan@gmail.com>