flimflam_test: Make connect-service work with shill. Look for the service using the name property and add retry when connecting to the service. The retry is needed because network_ConnmanCromoCrash starts the connect request before starting the pseudo modem/manager. BUG=chromium-os:33161 TEST=network_ConnmanCromoCrash Change-Id: Ib55bee919204624a795d9c95e8e4028df5ff5a55 Reviewed-on: https://gerrit.chromium.org/gerrit/30718 Reviewed-by: Ben Chan <[email protected]> Commit-Ready: Thieu Le <[email protected]> Tested-by: Thieu Le <[email protected]>