fixes bug in UWSMerge where pubdid param was not read from queryString

data-access/servlet/src/main/java/webapi/UWSMergeWork.java

@@ -174,7 +174,7 @@ public class UWSMergeWork extends JobThread
    private Map<String, String[]> collectSodaParams(UWSJob job)
    {
       Map<String, String[]> params = new HashMap<String, String[]>();
-      String[] paraTokens = {"skysystem","specsystem", "l","b","r","dl","db","vl","vu","vt","ID","POSSYS","BANDSYS","POS", "BAND", "TIME", "POL", "PIXELS"};
+      String[] paraTokens = {"skysystem","specsystem","pubdid","l","b","r","dl","db","vl","vu","vt","ID","POSSYS","BANDSYS","POS", "BAND", "TIME", "POL", "PIXELS"};
       for(String paramToken : paraTokens)
       {
          String[] paramValue = new String[1];