Remove redundant default value None for dict.get

The default value for dict.get is None, no need to specify again.

Change-Id: I3c894bb3449551c639094bf020277706000c3d60
Updated from global requirements

Change-Id: I8cba8f894f7967bb908fe2443946c28f1803c1d3
Merge "Updated from global requirements"
Merge "Remove redundant default value None for dict.get"