fix test

git-svn-id: https://svn.apache.org/repos/asf/maven/skins/trunk@1448939 13f79535-47bb-0310-9956-ffa450edef68
[MSKINS-78] Do not generate line with doxia timestamp
for stylus-skin too

git-svn-id: https://svn.apache.org/repos/asf/maven/skins/trunk@1448940 13f79535-47bb-0310-9956-ffa450edef68