Updated docker's default config to use regular bourne shell instead of bourne again. Closes #6920.
Updated docker's default config to use regular bourne shell instead of bourne again. Closes #6920.

ricardclau/packer,pecigonzalo/packer,dave2/packer,paulmey/packer,mkuzmin/packer,grubernaut/packer,bryson/packer,youhong316/packer,pecigonzalo/packer,mitchellh/packer,youhong316/packer,grubernaut/packer,rnaveiras/packer,dave2/packer,youhong316/packer,rnaveiras/packer,dave2/packer,grubernaut/packer,paulmey/packer,mitchellh/packer,hashicorp/packer,tas50/packer,dave2/packer,timsutton/packer,rnaveiras/packer,hashicorp/packer,paulmey/packer,paulmey/packer,ricardclau/packer,ricardclau/packer,hashicorp/packer,ricardclau/packer,tas50/packer,paulmey/packer,tas50/packer,bryson/packer,mitchellh/packer,mitchellh/packer,mkuzmin/packer,rnaveiras/packer,paulmey/packer,rnaveiras/packer,tas50/packer,grubernaut/packer,dave2/packer,mitchellh/packer,mkuzmin/packer,tas50/packer,timsutton/packer,timsutton/packer,bryson/packer,timsutton/packer,ricardclau/packer,youhong316/packer,ricardclau/packer,rnaveiras/packer,mkuzmin/packer,hashicorp/packer,pecigonzalo/packer,timsutton/packer,mkuzmin/packer,bryson/packer,grubernaut/packer,bryson/packer,timsutton/packer,youhong316/packer,grubernaut/packer,tas50/packer,dave2/packer,pecigonzalo/packer,mkuzmin/packer,bryson/packer,youhong316/packer