* Raise ConfigEntryNotReady for connection exception
Raise ConfigEntryNotReady for the connection exception like if the MQTT Server container/device is being restarted or was unavailable on boot.
* Add new exception
* grammar fix
* Possibly resolve hound comments
* raise `ConfigEntryNotReady` for mqtt connection error
* revert exceptions.py
* Update exceptions.py
* modify test to handle exception
* use constants to control exception scope
* Raise ConfigEntryNotReady for connection exception
Raise ConfigEntryNotReady for the connection exception like if the MQTT Server container/device is being restarted or was unavailable on boot.
* Add new exception
* Add new exception
* grammar fix
* Possibly resolve hound comments
* raise `ConfigEntryNotReady` for mqtt connection error
* revert exceptions.py
* Update exceptions.py
* modify test to handle exception
* use constants to control exception scope
* revert test change as it's not the same thing
* Update test_init.py
* Add test for MQTT OSError
* revert file changes from a bad rebase
* Rewrite test with valid syntax
* rewrite test to be less ambiguous
* add empty line
* add back 'axis'
* Remove empty line
* Update tests and undo merge from earlier
* correctly restore test for no connect broker
* fix test mock correctly
* line was too long. hit enter.
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