Brest bike parking: add image URL

To both faciliate working through the list of "issues" and have the
image in OSM. Got the confirmation from the Métropole that the urls are
stable and we're allowed to link them from OSM.

analysers/analyser_merge_bicycle_parking_FR_brest.py

@@ -60,6 +60,7 @@ def __init__(self, config, logger = None):
                         "start_date": "DATE_POSE",
                         "covered": lambda res: self.covered.get(res.get("TYPE_STAT")),
                         "operator": lambda res: "Brest Métropole" if res.get("DOM_PRIVE") == "Public" else None,
+                        "image": lambda res: res.get("LIEN_IMAGE").replace('\\','/') if res.get("LIEN_IMAGE") else None,
                     })))
 
     covered = {