Fix exception when a unifi config entry is ignored

[bdraco]

Proposed change

Fix exception when a unifi config entry is ignored

Fixes

2021-01-30 07:10:34 ERROR (MainThread) [homeassistant] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/ssdp/__init__.py", line 46, in initialize
    await scanner.async_scan(None)
  File "/usr/src/homeassistant/homeassistant/components/ssdp/__init__.py", line 74, in async_scan
    await self._process_entries(entries)
  File "/usr/src/homeassistant/homeassistant/components/ssdp/__init__.py", line 120, in _process_entries
    await asyncio.gather(*tasks)
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 130, in async_init
    result = await self._async_handle_step(
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 213, in _async_handle_step
    result: Dict = await getattr(flow, method)(user_input)
  File "/usr/src/homeassistant/homeassistant/components/unifi/config_flow.py", line 226, in async_step_ssdp
    if self._host_already_configured(self.config[CONF_HOST]):
  File "/usr/src/homeassistant/homeassistant/components/unifi/config_flow.py", line 249, in _host_already_configured
    if entry.data[CONF_CONTROLLER][CONF_HOST] == host:
KeyError: 'controller'

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example entry for configuration.yaml:

# Example configuration.yaml

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

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• Documentation added/updated for www.home-assistant.io

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[bdraco]

I need to write a test for this, but I need to sleep first

[Kane610]

Can be merged when test has been added 👍🏻

[frenck]

Marking it draft :)

[bdraco]

I fixed the existing test. Oops!

[Kane610]

LGTM!