Spencer Fraint

Confirm the snmp community regexes in `sensitive_item_removal.py` catch communities for all possible config lines (covering the variety of syntaxes/options allowed by routers).

Support prioritized list of dns, ntp, ... servers in data model

1

Some devices (e.g. [Palo Alto Networks firewalls](https://www.paloaltonetworks.com/documentation/80/pan-os/cli-gsg/use-the-cli/modify-the-configuration)) maintain a list of _prioritized_ `ntp` and `dns` servers. Right now, these are naturally ordered in a set saved in the vendor independent...

PaloAlto allows hybrid `address-group`, where some constituent `address` may come from the vsys in which the `address-group` is defined and others may come from `shared` "vsys" (or presumably could also...

For example, see the init `hybrid-cloud-aws` test ref: https://github.com/batfish/batfish/blob/master/tests/aws/init-example-aws.ref#L39 The only config showing up in the `parseStatus` in `ParseVendorConfigurationAnswerElement` is a non-AWS config: ``` "parseStatus" : { "configs/lhr-border-02.cfg" : "PASSED"...