Add configurable host for bbox routers

[isonet]

Add configurable host for bbox router running on non-default IP addresses.

Description:

The current implementation only supports bbox routers running on 192.168.1.254. I added a configuration entry to set the router IP address.

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#6333

Example entry for configuration.yaml (if applicable):

device_tracker:
  - platform: bbox
    host: 192.168.1.1

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.io

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

• [N/A] New dependencies have been added to the REQUIREMENTS variable ([example][ex-requir]).
• [N/A] New dependencies are only imported inside functions that use them ([example][ex-import]).
• [N/A] New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• [N/A] New files were added to .coveragerc.

If the code does not interact with devices:

• [N/A] Tests have been added to verify that the new code works.

[homeassistant]

Hi @isonet,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[houndci-bot]

line too long (86 > 79 characters)

[fabaff]

Thanks 🐦