Don't run the large inventory timing test locally.

This commit turns off local execution of the timing test for a large
inventory.

This test is pointless on local development, where (1) memory varies
widely and (2) we're using an entirely different database (SQLite) for
testing.

Pulling it out makes local testing considerably quicker and avoids
specious failures.

awx/main/tests/commands.py

@@ -11,6 +11,7 @@ import sys
 import tempfile
 import time
 import urlparse
+import unittest
 
 # Django
 from django.conf import settings
@@ -872,6 +873,9 @@ class InventoryImportTest(BaseCommandMixin, BaseLiveServerTest):
         self.assertEqual(new_inv.total_groups, ngroups)
         self.assertElapsedLessThan(30)
 
+    @unittest.skipIf(getattr(settings, 'LOCAL_DEVELOPMENT', False),
+                     'Skip this test in local development environments, '
+                     'which may vary widely on memory.')
     def test_large_inventory_file(self):
         new_inv = self.organizations[0].inventories.create(name='largeinv')
         self.assertEqual(new_inv.hosts.count(), 0)