changed WarExploder to account for when main directory it not called main

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@15925 71c3de6d-444a-0410-be80-ed276b4c234a

test/src/main/java/org/jvnet/hudson/test/WarExploder.java

@@ -76,7 +76,6 @@ final class WarExploder {
         }
 
         for( ; d!=null; d=d.getParentFile()) {
-            if(!d.getName().equals("main")) continue;
             if(new File(d,".hudson").exists())
                 break;
         }