Fix xmpp plugin link and descr
Fix xmpp plugin link and descr

Sausageo/jmeter-plugins,ptrd/jmeter-plugins,ptrd/jmeter-plugins,ptrd/jmeter-plugins,Sausageo/jmeter-plugins,Sausageo/jmeter-plugins,Sausageo/jmeter-plugins,Sausageo/jmeter-plugins,ptrd/jmeter-plugins,ptrd/jmeter-plugins