RFR: 8202628 : javadoc generates bad links in TestModules.java

[Priya Lakshmi Muthuswamy]

Hi,

Kindly review the minor test fix for 
https://bugs.openjdk.java.net/browse/JDK-8202628.
https://bugs.openjdk.java.net/browse/JDK-8202462 ( {@index} may cause 
duplicate labels) actually fixes the duplicates Id issue report in the test.
This change just removes the code which disables checkLinks.
webrev : http://cr.openjdk.java.net/~pmuthuswamy/8202628/webrev.00/

Thanks,
Priya