fixing enum handling in xml2protobuf

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16109 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
patching test config, this belongs to [16102] refs #21

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16114 29f149b2-0c63-11e1-8f5c-a347f6a9acd0