[autotest] Fix references to client.common_lib.site_utils

BUG=None
TEST=None

Change-Id: I889cd224c66509627cb6bc8677ead2ef3c3c6a87
Reviewed-on: https://chromium-review.googlesource.com/508167
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Tested-by: Allen Li <ayatane@chromium.org>
Commit-Queue: Allen Li <ayatane@chromium.org>
diff --git a/frontend/afe/moblab_rpc_interface.py b/frontend/afe/moblab_rpc_interface.py
index f0dd4c7..d83cafc 100644
--- a/frontend/afe/moblab_rpc_interface.py
+++ b/frontend/afe/moblab_rpc_interface.py
@@ -18,7 +18,8 @@
 import subprocess
 
 from autotest_lib.client.common_lib import error
-from autotest_lib.client.common_lib import global_config, utils, site_utils
+from autotest_lib.client.common_lib import global_config
+from autotest_lib.client.common_lib import utils
 from autotest_lib.frontend.afe import models
 from autotest_lib.frontend.afe import rpc_utils
 from autotest_lib.server import frontend
@@ -430,9 +431,9 @@
     lines = open(_ETC_LSB_RELEASE).readlines()
     version_response = {
         x.split('=')[0]: x.split('=')[1] for x in lines if '=' in x}
-    version_response['MOBLAB_ID'] = site_utils.get_moblab_id();
+    version_response['MOBLAB_ID'] = utils.get_moblab_id();
     version_response['MOBLAB_MAC_ADDRESS'] = (
-        site_utils.get_default_interface_mac_address())
+        utils.get_default_interface_mac_address())
     return rpc_utils.prepare_for_serialization(version_response)