camel-sql - Repeated parameters in URI are not treated correctly

When constructing Camel SQL component with the following URI:

sql:INSERT INTO TABLE ....?batch=true&...&batch=true

Resulting camel endpoint ends up with batch == false. The reason for this is found in 

private static void addParameter // this is in UriSupport.java

This method adds values into a list and then setting the parameter does not work correctly. I believe that Camel should be more linient for such "errors" (which can occur if you construct URI programatically). 

I suggest parameter value detection. If

existing.equals(value) // to use actual names of variables from the code

then just ignore. DO NOT do the following (list construction; current behavior):

if (existing instanceof List) {
    list = CastUtils.cast((List<?>) existing);
} else {
    // create a new list to hold the multiple values
    list = new ArrayList<String>();
    String s = existing != null ? existing.toString() : null;
    if (s != null) {
        list.add(s);
    }
}
list.add(value);

In the end the URI shown in the beginning will result in Component with batch equal to false. Which is really hard to determine why and what happened. 

I believe this is a generic problem tho