Strip id/uid from .json input

As noted inline, a default export from Grafana includes the uid/id
which breaks when you re-import it into a different site.  Strip them.

Change-Id: I318614b33aed2ece93d44e832bad7907724cb1bc

grafana_dashboards/parser.py

@@ -56,6 +56,13 @@ class YamlParser(object):
             slug = slugify(data['title'])
             if not self.data.get('dashboard'):
                 self.data['dashboard'] = {}
+            # The idea is that people work interactively locally using
+            # the GUI editor, then export the .json using the sharing
+            # panel.  That mostly works, but it can leave a id & uid
+            # that isn't valid when importing to another grafana
+            # instance.  Remove them.
+            data.pop('id', None)
+            data.pop('uid', None)
             self.data['dashboard'][slug] = data
         else:
             result = self.validate(data)

tests/fixtures/parser/json-dashboard-0001.json

@@ -137,5 +137,6 @@
   "timezone": "",
   "title": "test json",
   "uid": "M-GEcyWMk",
-  "version": 1
+  "version": 1,
+  "id": 1234
 }

tests/test_parser.py

@@ -109,3 +109,5 @@ class TestCaseParser(TestCase):
         # Get parsed dashboard
         res, md5 = self.parser.get_dashboard('test-json')
         self.assertEqual(res['title'], 'test json')
+        self.assertNotIn('id', res.keys())
+        self.assertNotIn('uid', res.keys())