As part of removing reliance on the old and deprecated zuul-cloner, we
need to shift constraints declaration to the deps line. This means we
unfortunately have to duplicate the extras declarations into
test-requirements - because otherwise the contraints for keystoneauth
conflicts with the installation of itself.
Change-Id: If162dde93423a495064c4ae1a5dad4e7eb8f9577
Adding constraints support to libraries is slightly more complex than
services as the libraries themselves are listed in upper-constraints.txt
which leads to errors that you can't install a specific version and a
constrained version.
This change adds constraints support by also adding a helper script to
edit the constraints to remove keystoneauth.
Change-Id: I5101c316ec57c6166ca7fee47de9450a936f0664