update build-testsuite.xml to reflect new location of netty module in wildfly 8.0.0

The module location of netty has changed wildfly 8.0.0. It was located in
${jboss.home}/modules/system/layers/base/org/jboss/netty/main/
its now located in
${jboss.home}/modules/system/layers/base/io/netty/main/
File build-testsuite.xml needs to be updated to reflect this so testsuite will run.