[BUG] unexpected keyword argument 'channel_icon'

[HangGlidersRule]

Describe the bug
When streaming live TV in Plex via the HDHR Viewer 2 plugin Varken fails to load the channel_icon key from Tautulli causing all metrics to be lost.

To Reproduce
Steps to reproduce the behavior:

1. Watch live TV via HDHR Viewer
2. Check Varken logs
3. Be sad when it's broken

Expected behavior
Varken should discard unexpected keys with a warning instead of a halt allowing metrics to be collected even in edge cases with custom configurations adding unknown keys to the stream.

Screenshots
2018-12-26 19:14:19 : INFO : __init__ : Running job Every 30 seconds do threaded(<bound method TautulliAPI.get_activity of <tautulli-1>>) (last run: 2018-12-26 19:13:49, next run: 2018-12-26 19:14:19) 2018-12-26 19:14:19 : ERROR : tautulli : TypeError has occurred : __new__() got an unexpected keyword argument 'channel_icon' while creating TautulliStream structure

Environment (please complete the following information):

• OS: Docker:master
• Version v1.4

Additional context
https://github.com/zynine-/HDHRViewerV2.bundle

[samwiseg0]

What is contained in channel_icon? Is it a string, integer, etc?

You can find the actual data in Tautulli by clicking in the word STREAM in the activity card.

[HangGlidersRule]

channel_icon is a string

Here is the output for the three channel_* keys -

"channel_icon": "http://resources-cdn.plexapp.com/image/source/com.plexapp.plugins.hdhrviewer.v2.jpg?h=None", "channel_stream": 1, "channel_title": "20:00 - 21:00: Anderson Cooper 360",

[samwiseg0]

Fixed in nightly