Move job_repo_url related calls to afe_utils

This is to allow adb_host to adopt similar appraoch to store devserver
url to host attributes.

BUG=chromium:586327
TEST=local run test, unittest suite

Change-Id: Iab2d05c4b7a8278ca8499025038995ea1d5aaae1
Reviewed-on: https://chromium-review.googlesource.com/327257
Commit-Ready: Dan Shi <dshi@google.com>
Tested-by: Dan Shi <dshi@google.com>
Reviewed-by: Kevin Cheng <kevcheng@chromium.org>
5 files changed