Better handle exceptions from Sonos players (#2085)

Sonos players can be dynamically set in various modes, for example
as TV players or Line-IN or straming from radios channels, therefore
some methods could not be available, and when invoked they cause
long exceptions to be logged. This partially solves the problem
reducing the output and logging some more informative error message

homeassistant/components/media_player/sonos.py

@@ -74,16 +74,26 @@ def only_if_coordinator(func):
 
     If used as decorator, avoid calling the decorated method if player is not
     a coordinator. If not, a grouped speaker (not in coordinator role) will
-    throw soco.exceptions.SoCoSlaveException
+    throw soco.exceptions.SoCoSlaveException.
+
+    Also, partially catch exceptions like:
+
+    soco.exceptions.SoCoUPnPException: UPnP Error 701 received:
+    Transition not available from <player ip address>
     """
     def wrapper(*args, **kwargs):
         """Decorator wrapper."""
         if args[0].is_coordinator:
-            return func(*args, **kwargs)
+            from soco.exceptions import SoCoUPnPException
+            try:
+                func(*args, **kwargs)
+            except SoCoUPnPException:
+                _LOGGER.error('command "%s" for Sonos device "%s" '
+                              'not available in this mode',
+                              func.__name__, args[0].name)
         else:
-            _LOGGER.debug('Ignore command "%s" for Sonos device "%s" '
-                          '(not coordinator)',
-                          func.__name__, args[0].name)
+            _LOGGER.debug('Ignore command "%s" for Sonos device "%s" (%s)',
+                          func.__name__, args[0].name, 'not coordinator')
 
     return wrapper