Handle connection errors when connecting to Apple TVs

[postlund]

Description:
Should fix these kinds of errors:

17-02-09 08:23:05 ERROR (MainThread) [homeassistant.core] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/aiohttp/connector.py", line 666, in _create_direct_connection
    local_addr=self._local_addr)
  File "/usr/lib/python3.4/asyncio/base_events.py", line 570, in create_connection
    raise exceptions[0]
  File "/usr/lib/python3.4/asyncio/base_events.py", line 557, in create_connection
    yield from self.sock_connect(sock, address)
  File "/usr/lib/python3.4/asyncio/futures.py", line 388, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/usr/lib/python3.4/asyncio/tasks.py", line 286, in _wakeup
    value = future.result()
  File "/usr/lib/python3.4/asyncio/futures.py", line 277, in result
    raise self._exception
  File "/usr/lib/python3.4/asyncio/selector_events.py", line 382, in _sock_connect_cb
    raise OSError(err, 'Connect call failed %s' % (address,))
ConnectionRefusedError: [Errno 111] Connect call failed ('10.0.10.22', 3689)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/aiohttp/connector.py", line 350, in connect
    yield from self._create_connection(req)
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/aiohttp/connector.py", line 643, in _create_connection
    transport, proto = yield from self._create_direct_connection(req)
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/aiohttp/connector.py", line 689, in _create_direct_connection
    (req.host, req.port, exc.strerror)) from exc
aiohttp.errors.ClientOSError: [Errno 111] Can not connect to 10.0.10.22:3689 [Connect call failed ('10.0.10.22', 3689)]

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.4/asyncio/tasks.py", line 233, in _step
    result = coro.throw(exc)
  File "/home/pi/home-assistant/homeassistant/helpers/entity_component.py", line 336, in _async_process_entity
    new_entity, self, update_before_add=update_before_add
  File "/home/pi/home-assistant/homeassistant/helpers/entity_component.py", line 181, in async_add_entity
    yield from entity.async_update()
  File "/home/pi/home-assistant/homeassistant/components/media_player/apple_tv.py", line 119, in async_update
    playing = yield from self._atv.metadata.playing()
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/pyatv/internal/apple_tv.py", line 240, in playing
    playstatus = yield from self.apple_tv.playstatus()
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/pyatv/daap.py", line 131, in get
    yield from self._assure_logged_in()
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/pyatv/daap.py", line 185, in _assure_logged_in
    yield from self.login()
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/pyatv/daap.py", line 119, in login
    resp = yield from self._do(_login_request)
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/pyatv/daap.py", line 145, in _do
    resp, status = yield from action()
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/pyatv/daap.py", line 50, in get_data
    url, headers=_DMAP_HEADERS, timeout=self._timeout)
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/aiohttp/client.py", line 577, in __iter__
    resp = yield from self._coro
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/aiohttp/client.py", line 215, in _request
    conn = yield from self._connector.connect(req)
  File "/opt/home-assistant/virtualenv/lib/python3.4/site-packages/aiohttp/connector.py", line 360, in connect
    .format(key, exc.strerror)) from exc
aiohttp.errors.ClientOSError: [Errno 111] Cannot connect to host 10.0.10.22:3689 ssl:False [Can not connect to 10.0.10.22:3689 [Connect call failed ('10.0.10.22', 3689)]]

Also bump pyatv to 0.1.2 which fixes a request leak.

Checklist:

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

• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.

[mention-bot]

@postlund, thanks for your PR! By analyzing the history of the files in this pull request, we identified @balloob, @fabaff and @rmkraus to be potential reviewers.

[andrey-git]

Please fix lint errors

[pvizeli]

Asyncio is a core module. Please import it on top

[balloob]

cherry-picked