I think these duplicate dependencies came in because we were not
correctly always installing "general" packages (see
Ie1b8d09369281059d21da61b2725a457f708ae9e)
Most of these are just extras for the lxml dependencies; I added zlib
devel to general for glance (seems pretty generic), and then that can
go too, as all other packages are specified.
Change-Id: I44b14ca15c64fad9daf1ac8d851704b02ea2eae0
a5e4c0f279