Move bin/ scripts to entrypoints.
Move bin/ scripts to entrypoints.

Instead of propogating more bin scripts, migrate these to be things
that can be consumed as entrypoints.

Change-Id: Ic01e0f16fe9e7634708fbb51499ccea3f4f40d63

varunarya10/oslo.rootwrap,citrix-openstack-build/oslo.rootwrap,ttx/oslo.rootwrap