Updates all XML descriptions to latest schema version and
also includes adaptions to the test XML descriptions for
testing the new Xen guest and server setup
The packages subsection <ignore> only accepted a package
name to become ignored. However a <package> subsection
to install a package allows for an arch selection. The
same should apply to ignore a package. In addition the
allowed content for the arch attribute has been changed
from simple text to a regular expression. Allowed is a
comma seperated list of reserved architecture words like
they are displayed by uname -m
This commit adds a tester method to check if there is any
repository marked as imageinclude. The method is used to
execute import_repositories_marked_as_imageinclude
method only when it is actually needed.
