juno: Removed default bootargs
juno: Removed default bootargs

The default boot args have been removed since these cause issues with
the latest Linaro builds, which boot correctly without any bootargs.

Also made a regex string a raw-string.

ep1cman/workload-automation,jimboatarm/workload-automation,ep1cman/workload-automation,bathepawan/workload-automation,chase-qi/workload-automation,bjackman/workload-automation,ep1cman/workload-automation,jimboatarm/workload-automation,bjackman/workload-automation,bjackman/workload-automation,bjackman/workload-automation,ep1cman/workload-automation,Sticklyman1936/workload-automation,jimboatarm/workload-automation,bathepawan/workload-automation,bjackman/workload-automation,ep1cman/workload-automation,bjackman/workload-automation,bathepawan/workload-automation,bathepawan/workload-automation,Sticklyman1936/workload-automation,Sticklyman1936/workload-automation,Sticklyman1936/workload-automation,chase-qi/workload-automation,jimboatarm/workload-automation,chase-qi/workload-automation,jimboatarm/workload-automation,bathepawan/workload-automation,Sticklyman1936/workload-automation,chase-qi/workload-automation,jimboatarm/workload-automation,bathepawan/workload-automation,Sticklyman1936/workload-automation,chase-qi/workload-automation,chase-qi/workload-automation,ep1cman/workload-automation