devserver: DevServerUtil suffix renamed

To retain consistency with a recent cleanup CL, in which devserver_util
was renamed common_util, we change class names starting with
DevServerUtil into CommonUtil.

BUG=None
TEST=Unit tests; devserver starts and serves content

Change-Id: I7bbc1d88d2e11d5c0def970c2a4226b1efe1bb59
Reviewed-on: https://gerrit.chromium.org/gerrit/34427
Reviewed-by: Scott Zawalski <scottz@chromium.org>
Commit-Ready: Gilad Arnold <garnold@chromium.org>
Tested-by: Gilad Arnold <garnold@chromium.org>
3 files changed