Handle bad remote changes values

2019-02-15 11:57:00 81843 123145400414208 DEBUG    urllib3.connectionpool https://SERVER:443 "POST /nuxeo/site/automation/NuxeoDrive.GetChangeSummary HTTP/1.1" 302 0
2019-02-15 11:57:00 81843 123145400414208 DEBUG    urllib3.connectionpool https://SERVER:443 "GET /nuxeo/site/api/v1/drive/configuration HTTP/1.1" 200 403
2019-02-15 11:57:00 81843 123145400414208 DEBUG    nuxeo.client       Response from 'https://SERVER/nuxeo/site/automation/NuxeoDrive.GetChangeSummary': '{\n  "delay": 30,\n  "ignored_prefixes": [".", "icon\\r", "thumbs.db", "desktop.ini", "~$"],\n  "ignored_suffixes": [".bak", ".crdownload", ".dwl", ".dwl2", ".lnk", ".lock", ".nxpart", ".part", ".partial", ".swp", ".tmp", "~"],\n  "ignored_files": ["^atmp\\\\d+$"],\n  "log_level_file": "DEBUG",\n  "timeout": 30,\n  "handshake_timeout": 60,\n  "beta_channel": false,\n  "update_check_delay": 3600,\n  "ui": "web"\n}\n' with cookies ...>
2019-02-15 11:57:00 81843 123145400414208 ERROR    nxdrive.engine.watcher.remote_watcher Unexpected error
Traceback (most recent call last):
  File "nxdrive/engine/watcher/remote_watcher.py", line 591, in _handle_changes
  File "nxdrive/engine/activity.py", line 118, in func_wrapper
  File "nxdrive/engine/watcher/remote_watcher.py", line 660, in _update_remote_states
  File "nxdrive/engine/watcher/remote_watcher.py", line 624, in _get_changes
KeyError: 'activeSynchronizationRootDefinitions'