tag tests that need internet so they can be skipped

tag tests that need to download the FAB-Skeleton with 'needs_inet'. This will
allow them to easily be skipped when running in an environment that doesn't
have internet connectivity, such as the Debian build servers.

flask_appbuilder/tests/test_fab_cli.py

@@ -1,6 +1,7 @@
 import glob
 import json
 import logging
+from nose.plugins.attrib import attr
 import os
 import tempfile
 from unittest.mock import ANY, patch
@@ -36,6 +37,7 @@ def setUp(self):
     def tearDown(self):
         log.debug("TEAR DOWN")
 
+    @attr("needs_inet")
     def test_create_app(self):
         """
             Test create app, create-user
@@ -69,6 +71,7 @@ def test_create_app(self):
 
             runner.invoke(reset_password, ["--username=bob", "--password=bar"])
 
+    @attr("needs_inet")
     def test_list_views(self):
         """
             CLI: Test list views