Support get_mac_address_table() on L2NG switches

[mirceaulinic]

Hi @bkeifer - I had to close #199 (your branch was very old and there were many conflicts, so I gave up and picked your commits).

I have added four more commits to continue your work:

• Because you are looking under two different facts to determine what RPC to execute, see:

  napalm-junos/napalm_junos/junos.py

  Lines 1289 to 1290 in c710b0a

  	if self.device.facts.get('personality', '') in ['SWITCH']: # for EX & QFX devices
  	if self.device.facts.get('switch_style', '') in ['VLAN_L2NG']: # for L2NG devices

  You need both facts specified in the static facts file under the test case: 2868662.
• The junos namespace should be removed from the input XML: a52a25c.
• I dropped the static field fb4a242 -- I'm not sure where you copied that from.
• The expected_result.json must be JSON & respect the correct output according to the mocked data you provided: 40da0b4

Let me know if you have any questions, I hope my information will help you in the future. Thanks for your PR, this enhancement will be included in the next release, 0.12.1.

[coveralls]

Coverage increased (+0.04%) to 78.804% when pulling 40da0b4 on mirceaulinic:mac-l2ng-switches into 3a73f1b on napalm-automation:develop.

[mirceaulinic]

@ktbyers @dbarrosop @bkeifer can you review please?

[dbarrosop]

Yay! I didn't have to ask for tests ;)

+1