Enable autotest client package fetching based on updated image.

client/common_lib/site_packages.py

Index: client/common_lib/site_packages.py
diff --git a/client/common_lib/site_packages.py b/client/common_lib/site_packages.py
new file mode 100644
index 0000000000000000000000000000000000000000..c9cb75bd0afe1c32aa9f97990569c89d240c6dea
--- /dev/null
+++ b/client/common_lib/site_packages.py
@@ -0,0 +1,16 @@
+from autotest_lib.client.common_lib import base_packages
+
+
+class SiteHttpFetcher(base_packages.HttpFetcher):
+    # shortcut quick http test for now since our dev server does not support
+    # this operation.
+    def _quick_http_test(self):
+        return
+
+
+class SitePackageManager(base_packages.BasePackageManager):
+    def get_fetcher(self, url):
+        if url.startswith('http://'):
+            return SiteHttpFetcher(self, url)
+        else:
+            return super(SitePackageManager, self).get_fetcher(url)