Fix parsing of "&&" in command (rancher/rancher#5855)
Fix parsing of "&&" in command (rancher/rancher#5855)

vincent99/ui,pengjiang80/ui,rancher/ui,pengjiang80/ui,rancherio/ui,lvuch/ui,rancherio/ui,pengjiang80/ui,rancher/ui,rancherio/ui,westlywright/ui,lvuch/ui,lvuch/ui,westlywright/ui,westlywright/ui,rancher/ui,vincent99/ui,vincent99/ui