Previously the WA device name was used when searching for revent files.
Since most were `generic_android` this made it difficult to keep revent
files for multiple android devices. Now it the device model is used instead.
If a file with the device model is not found it will fall back to the WA
device name.
- Two different parameters may now have the same global alias as long as
their types match
- `extension_asset` resource getter now picks up the path to the mouted
filer from ``remote_assets_path`` global setting.
