scope param is added to allow getting multiple independent instances
of a driver. This is particularly useful for using same VIFPoolDriver
implementation for multiple PodVIFDrivers (eg. NoopVIFPool may be
used for multiple PodVIFDriver types)
Also renames driver_alias to specific_driver to better indicate its
function.
Related-Bug: 1747406
Change-Id: Iea3b65b91f362a18cca6bf9d44d938063a56118b
Signed-off-by: Yash Gupta <y.gupta@samsung.com>
cb2d308f84