Fixes for tesla. New sensors.

[zabuldon]

Description: Fixes for tesla. New sensors.

Related issue (if applicable): fixes #11970

Checklist:

• The code change is tested and works locally.

If the code communicates with devices, web services, or third-party tools:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.

[houndci-bot]

line too long (94 > 79 characters)

[balloob]

Thanks! 🎉

[phithor]

So how do I get the milage&/range in kilometres instead of Miles?
My Hass config is metric and my car units is obv. metric/kilometres. Running normal Home Assistant 0.63.2.
The milage/range shows in the equivalent length in miles with unit km. My car has run abot 60+k km but it shows 38k km.

[JoacimRC]

Thanks for fixing, but the fix seems to have removed the Battery level sensor. The two lines of code removed related to the Battery sensor makes the sensor update fail:

2018-03-07 20:12:35 ERROR (MainThread) [homeassistant.components.sensor] tesla: Error on device update!
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/homeassistant/helpers/entity_platform.py", line 197, in _async_add_entity
    yield from entity.async_device_update(warning=False)
  File "/usr/lib/python3.6/site-packages/homeassistant/helpers/entity.py", line 327, in async_device_update
    yield from self.hass.async_add_job(self.update)
  File "/usr/lib/python3.6/asyncio/futures.py", line 332, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/usr/lib/python3.6/asyncio/tasks.py", line 250, in _wakeup
    future.result()
  File "/usr/lib/python3.6/asyncio/futures.py", line 245, in result
    raise self._exception
  File "/usr/lib/python3.6/concurrent/futures/thread.py", line 56, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/lib/python3.6/site-packages/homeassistant/components/sensor/tesla.py", line 82, in update
    self.current_value = self.tesla_device.get_value()
AttributeError: 'Battery' object has no attribute 'get_value'

[MartinHjelmare]

@JoacimRC please open an issue.