Move xmlrpc servers to client/cros

Having these files in client/common_lib/cros makes it appear as if
it is acceptable to include them from server code.  Unfortunately,
many of them have dependencies on DBus, which makes them appropriate
only for inclusion in client contexts.

BUG=chromium:485834
TEST=These tests have been confirmed to work:
  - network_WiFi_SimpleConnect.wifi_checkWPA_TKIP
  - bluetooth_Sanity_Discoverable

Change-Id: I8fe2beb8dab22678e4aa33f357065ca474c515d5
Reviewed-on: https://chromium-review.googlesource.com/290731
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
Tested-by: Christopher Wiley <wiley@chromium.org>
diff --git a/client/cros/networking/common.py b/client/cros/networking/common.py
new file mode 100644
index 0000000..3bae9bd
--- /dev/null
+++ b/client/cros/networking/common.py
@@ -0,0 +1,18 @@
+# Copyright 2015 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""This module provides access to the autotest_lib.client namespace. It must be
+   included before any of the modules from that namespace."""
+
+import os, sys
+
+dirname = os.path.dirname(sys.modules[__name__].__file__)
+client_dir = os.path.abspath(os.path.join(dirname, "..", ".."))
+sys.path.insert(0, client_dir)
+
+import setup_modules
+
+sys.path.pop(0)
+setup_modules.setup(base_path=client_dir,
+                    root_module_name="autotest_lib.client")