HasAssociation fails when there is multiple extensions with same mime type.

Steps to reproduce:
Create a JNLP with mulitple associations with same mime type.
     <association extensions="abc" mime-type="x-application/abc"/>
     <association extensions="xyz" mime-type="x-application/abc"/>

Invoke hasAssociation -
String mime = "x-application/abc";
        String []exts = {"abc","xyz"};
        boolean result = is.hasAssociation(mime,exts);
Expected reuslt is true. where as it is returning false.

TestCase: http://jdeploy01.india.sun.com:8080/JavawsMustangIntegTest/integrationService/HasMultipleAssociation.jnlp