fix: wiki not displaying cloud history

when generating the assignments page we were using the data from
the schedule in that day. Turns out the schedule  object maps to
the cloud object which is constantly being modified as we do for
defining new clouds.
added a fix to look for the first cloudhistory object with the same
cloud name, that has been created right before the schedule object.

closes: #297
Change-Id: I2431a868d539a4636407ae96505119b66cab4f36

quads/tools/simple_table_generator.py

@@ -6,7 +6,7 @@
 from datetime import datetime
 from jinja2 import Template
 from quads.config import conf, TEMPLATES_PATH
-from quads.model import Schedule, Host
+from quads.model import Schedule, Host, Cloud, CloudHistory
 
 
 def generator(_host_file, _days, _month, _year, _gentime):
@@ -41,9 +41,17 @@ def generator(_host_file, _days, _month, _year, _gentime):
             }
 
             if schedule:
-                _day["display_description"] = schedule.cloud.description
-                _day["display_owner"] = schedule.cloud.owner
-                _day["display_ticket"] = schedule.cloud.ticket
+                cloud = CloudHistory.objects(
+                    __raw__={
+                        "_id": {
+                            "$lt": schedule.id
+                        },
+                        "name": schedule.cloud.name
+                    }
+                ).order_by("-_id").first()
+                _day["display_description"] = cloud.description
+                _day["display_owner"] = cloud.owner
+                _day["display_ticket"] = cloud.ticket
             __days.append(_day)
 
         line["days"] = __days