Issue #1923 Optional Flag values ignored

[icarus747]

Changed the Data regex to include optional flags (#, *, +) for some Cisco devices ad the end of an ARP entry line.

Data
  ^${IP_ADDRESS}\s+${AGE}\s+${MAC_ADDRESS}\s+${INTERFACE}\s+${PHYSICAL_INTERFACE}(?:\s+[\#\*\+])?\s*$$ -> Record
  ^. -> Error

To address issue #1923

[mjbear]

@icarus747
There needs to be test data (raw and parsed) in addition to the template changes.

https://github.com/networktocode/ntc-templates/blob/master/docs/dev/dev_environment.md
https://github.com/networktocode/ntc-templates/blob/master/docs/dev/dev_parser.md#development-helper-scripts

I'll review the template and submit some changes shortly.
Once I send my changes you can review them and then click the button to accept them. 🙂

[mjbear]

@icarus747
Here's a PR icarus747/pull/1 with your test data from issue #1923.
I monkeyed with it so there are cases for all three symbols. 😁

I would still recommend experimenting with the test scripts and so forth before your next contribution! 😀