Adds password and keyboard interactive authentication to the oracle-bmcs builder.
Replace use of t.Errorf with t.Fatalf to prevent subsequent panic on nil pointer access.
Implements a new Packer builder (oracle-bmcs) which adds support for building custom images for Oracle Bare Metal Cloud Services (BMCS) https://cloud.oracle.com/en_US/bare-metal. Additionally includes documentation for the oracle-bmcs builder.
Andrew Pryde