use AnyBranchScheduler for pulls, remove submodule cmd for go-ethereum
use AnyBranchScheduler for pulls, remove submodule cmd for go-ethereum

chfast/ethereum-buildbot,vaporry/ethereum-buildbot,ethereum/ethereum-buildbot,vaporry/ethereum-buildbot,ethereum/ethereum-buildbot,vaporry/ethereum-buildbot,ethereum/ethereum-buildbot,chfast/ethereum-buildbot,chfast/ethereum-buildbot