Fix serialization of datestamps

Author: okorach

sonar/branches.py

@@ -231,6 +231,7 @@ def export(self, export_settings: types.ConfigSettings) -> types.ObjectJsonRepr:
         if export_settings.get("FULL_EXPORT", True):
             data.update({"name": self.name, "project": self.concerned_object.key})
         if export_settings["MODE"] == "MIGRATION":
+            data["lastAnalysis"] = util.date_to_string(self.last_analysis())
             lang_distrib = self.get_measure("ncloc_language_distribution")
             loc_distrib = {}
             if lang_distrib:

sonar/projects.py

@@ -961,6 +961,7 @@ def export(self, export_settings: types.ConfigSettings, settings_list: dict[str,
             json_data = util.filter_export(json_data, _IMPORTABLE_PROPERTIES, export_settings.get("FULL_EXPORT", False))
 
             if export_settings["MODE"] == "MIGRATION":
+                json_data["lastAnalysis"] = util.date_to_string(self.last_analysis())
                 json_data["detectedCi"] = self.ci()
                 json_data["revision"] = self.revision()
                 lang_distrib = self.get_measure("ncloc_language_distribution")