add docs for user_data_file and user_data to oracle-oci builder page
add docs for user_data_file and user_data to oracle-oci builder page

grubernaut/packer,pecigonzalo/packer,tb3088/packer,mitchellh/packer,rnaveiras/packer,tb3088/packer,bryson/packer,hashicorp/packer,ChrisLundquist/packer,paulmey/packer,hashicorp/packer,ricardclau/packer,paulmey/packer,tas50/packer,tb3088/packer,youhong316/packer,ricardclau/packer,mitchellh/packer,tb3088/packer,timsutton/packer,rnaveiras/packer,youhong316/packer,KohlsTechnology/packer,ricardclau/packer,tas50/packer,mkuzmin/packer,bryson/packer,youhong316/packer,youhong316/packer,tas50/packer,grubernaut/packer,tas50/packer,mitchellh/packer,ChrisLundquist/packer,mitchellh/packer,pecigonzalo/packer,KohlsTechnology/packer,KohlsTechnology/packer,rnaveiras/packer,KohlsTechnology/packer,grubernaut/packer,dave2/packer,KohlsTechnology/packer,bryson/packer,mkuzmin/packer,timsutton/packer,dave2/packer,tb3088/packer,paulmey/packer,grubernaut/packer,mkuzmin/packer,paulmey/packer,timsutton/packer,timsutton/packer,bryson/packer,ChrisLundquist/packer,bryson/packer,KohlsTechnology/packer,paulmey/packer,timsutton/packer,ricardclau/packer,grubernaut/packer,timsutton/packer,dave2/packer,dave2/packer,mkuzmin/packer,mitchellh/packer,tas50/packer,rnaveiras/packer,hashicorp/packer,rnaveiras/packer,ricardclau/packer,pecigonzalo/packer,mkuzmin/packer,tb3088/packer,bryson/packer,grubernaut/packer,dave2/packer,paulmey/packer,dave2/packer,ChrisLundquist/packer,tas50/packer,ChrisLundquist/packer,mkuzmin/packer,youhong316/packer,youhong316/packer,pecigonzalo/packer,rnaveiras/packer,ricardclau/packer,ChrisLundquist/packer,hashicorp/packer