This prepares for the RHEL OSP implementation by making the build
tool convert all binary-* into an install_type of binary and * into
an install_metatype variable substitution inside the Dockerfiles.
Further binary-* is substituted as install_name to enable proper
building only.

Change-Id: Ib681b29176eb79a3cab12ec824313fdecb6e7a5f
Partially-Implements: blueprint rhel-based-image-support

Add 'rhel' to list for RPM based distros.  Also sort the distro
list for rpm packages for affected lines.

Change-Id: Ied4cb3e9763d6c6359f314d16185383ac3e006ed
Partially-Implements: blueprint rhel-based-image-support

Updated build.py to reflect this change.
Deprecate --template option and make it a noop.

Change-Id: I7cd98d1ee684a4c64984a49597159868152683b2
Partially-Implements: blueprint remove-docker-dir

This patch allows to add instructions to final images
like setting runtime environment variables or deleting
build time HTTP proxies

Change-Id: I23ad325e0898d77804a22038ddc618e1e49afd88
Partially-Implements: blueprint add-proxy-to-dockerfiles

Change-Id: I740f1ccc5763b683a39957304a7cce3f43f2c588
Partially-Implements: blueprint dockerfile-template