filters/ccs-propagate-cman: remove a debugging message

(well, embarrassing)

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
filters/ccs-propagate-cman: mimic cman-preconfig more closely

Also refactor some respective bits out of ccs2needlexml.

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>
filters/xml2simpleconfig: sort xml attrs (=stable output)

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>