Security fix & lock for HomeMatic (#11980)

* HomeMatic KeyMatic device become a real lock component

* Adds supported features to lock component.

Locks may are capable to open the door latch.
If component is support it, the SUPPORT_OPENING bitmask can be supplied in the supported_features property.

* hound improvements.

* Travis improvements.

* Improvements from review process

* Simplifies is_locked method

* Adds an openable lock in the lock demo component

* removes blank line

* Adds test for openable demo lock and lint and reviewer improvements.

* adds new line...

* Comment end with a period.

* Additional blank line.

* Mock service based testing, lint fixes

* Update description

homeassistant/components/lock/homematic.py

@@ -0,0 +1,58 @@
+"""
+Support for Homematic lock.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/lock.homematic/
+"""
+import logging
+from homeassistant.components.lock import LockDevice, SUPPORT_OPEN
+from homeassistant.components.homematic import HMDevice, ATTR_DISCOVER_DEVICES
+from homeassistant.const import STATE_UNKNOWN
+
+
+_LOGGER = logging.getLogger(__name__)
+
+DEPENDENCIES = ['homematic']
+
+
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """Set up the Homematic lock platform."""
+    if discovery_info is None:
+        return
+
+    devices = []
+    for conf in discovery_info[ATTR_DISCOVER_DEVICES]:
+        devices.append(HMLock(conf))
+
+    add_devices(devices)
+
+
+class HMLock(HMDevice, LockDevice):
+    """Representation of a Homematic lock aka KeyMatic."""
+
+    @property
+    def is_locked(self):
+        """Return true if the lock is locked."""
+        return not bool(self._hm_get_state())
+
+    def lock(self, **kwargs):
+        """Lock the lock."""
+        self._hmdevice.lock()
+
+    def unlock(self, **kwargs):
+        """Unlock the lock."""
+        self._hmdevice.unlock()
+
+    def open(self, **kwargs):
+        """Open the door latch."""
+        self._hmdevice.open()
+
+    def _init_data_struct(self):
+        """Generate the data dictionary (self._data) from metadata."""
+        self._state = "STATE"
+        self._data.update({self._state: STATE_UNKNOWN})
+
+    @property
+    def supported_features(self):
+        """Flag supported features."""
+        return SUPPORT_OPEN