Fix incorrectly template path after a POST to whitelist an IP.
Fix incorrectly template path after a POST to whitelist an IP.

7b456188cab64ab7e87b9b9eafdf83823b0a51c1 partially fixed it but not completely.

R=vadimsh@chromium.org
BUG=

Review URL: https://codereview.appspot.com/138750043

pombreda/swarming,luci/luci-py,luci/luci-py,pombreda/swarming,madecoste/swarming,luci/luci-py,madecoste/swarming,madecoste/swarming,pombreda/swarming,pombreda/swarming,luci/luci-py,madecoste/swarming