8025910: rename substream(long) -> skip and remove substream(long,long)
Reviewed-by: psandoz, henryjen
<?xml version="1.0" encoding="ISO-8859-1"?>
<excludeList>
<test id="JDK-8014647.js" />
<test id="javaclassoverrides.js" />
<test id="JDK-8020809.js" />
</excludeList>