Ignore more loading errors

[balloob]

Description:

Realized I did not restore some part of error avoiding logic in #14327. Adding it back.

Fixes:

2018-05-07 10:28:15 ERROR (MainThread) [homeassistant.loader] Error loading custom_components.automation.state. Make sure all dependencies are installed
Traceback (most recent call last):
  File "/Users/paulus.schoutsen/dev/hass/home-assistant/homeassistant/loader.py", line 86, in get_component
    module = importlib.import_module(path)
  File "/usr/local/Cellar/python/3.6.5/Frameworks/Python.framework/Versions/3.6/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 941, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 953, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'custom_components.automation'