Add description for snapshots

gns3server/schemas/snapshot.py

@@ -25,6 +25,10 @@ SNAPSHOT_CREATE_SCHEMA = {
             "description": "Snapshot name",
             "minLength": 1
         },
+        "description": {
+            "description": "Snapshot description",
+            "minLength": 1
+        },
     },
     "additionalProperties": False,
     "required": ["name"]
@@ -59,11 +63,16 @@ SNAPSHOT_OBJECT_SCHEMA = {
             "type": "string",
             "minLength": 1
         },
+        "description": {
+            "description": "Snapshot description",
+            "type": "string",
+            "minLength": 1
+        },
         "created_at": {
             "description": "Date of the snapshot (UTC timestamp)",
             "type": "integer"
         }
     },
     "additionalProperties": False,
-    "required": ["snapshot_id", "name", "filename", "created_at", "project_id"]
+    "required": ["snapshot_id", "name", "filename", "created_at", "description", "project_id"]
 }