[autotest] Update control files to import dynamic_suites from new location.

This change relies on https://gerrit.chromium.org/gerrit/#/c/30267/
being deployed to the autotest server.  As such, it can't be landed in
the same changelist.

BUG=chromium-os:30266
TEST=remote trybot with HWTest, after deployment of refactoring change.

Change-Id: If65cdb74b101c477ccb428c337112cd40a7e92a9
Reviewed-on: https://gerrit.chromium.org/gerrit/30499
Tested-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: Scott Zawalski <scottz@chromium.org>
Commit-Ready: Chris Masone <cmasone@chromium.org>
diff --git a/test_suites/control.wificell b/test_suites/control.wificell
index 8f3443a..0fcb343 100644
--- a/test_suites/control.wificell
+++ b/test_suites/control.wificell
@@ -22,7 +22,7 @@
 """
 
 import common
-from autotest_lib.server.cros import dynamic_suite
+from autotest_lib.server.cros.dynamic_suite import dynamic_suite
 
 dynamic_suite.reimage_and_run(
     build=build, board=board, name='wificell', job=job, pool=pool,