In order to troubleshoot why the periodic jobs are failing
due to a missing opendaylight role (which only exists in
master), verbose logging is implemented when executing
the role fetch via git so that we can see zuul-cloner's
detailed output.
Change-Id: I8a27240914a9154f4c94c50c925906432532c2d0
(cherry picked from commit 3407125b5a)