Set constant JDK 10-GPL url and unify EA url extraction
Set constant JDK 10-GPL url and unify EA url extraction

Now that there are two (11 and 12) Early Access feature builds
available on http://jdk.java.net the if statement reading
"${feature}" == "${latest_jdk}" doesn't make sense anymore.

The script now treats all non-fixed url the same.

sormuras/bach,sormuras/bach