This change updates the docker files to use base_package_type instead
of doing specific distro checks for the rhel/deb generic cases. The
base_distro is still available and is used when a specific distro needs
a customization but if the differences are purely rpm vs deb, then the
base_package_type can be used.
Change-Id: I8d720bb185df65a0178061ccf20b1ab2265da2c5
ae1322ec10