For filesystem images the rsync call was missing a finale slash for
the source path causing the sync also the containing directory. With
this change the filesystem image does not include the rootfs in any
subdirectory.
Fixes#875
kiwi defines a global Defaults.get_exclude_list_for_root_data_sync
method but it was not used in the scope of the filesystem builder.
Thus this builder was missing the exclusion of the .buildenv
file. This references Issue #422 and Fixes#814
This commit renames export_rpm_packages_list method to
export_packages_list and it includes support for listing
debian packages if apt-get package manager is used.
Fixes#457
nose is no longer maintained, thus we have to move to another
testing system. This commit updates the tox setup and all tests
to use pytest instead of nose.
