fix(config): Move failIce to testing

modules/xmpp/JingleSessionPC.js

      * @returns {void}
      */
     doInitialize(options) {
-        this.failICE = Boolean(options.failICE);
+        this.failICE = Boolean(options.testing?.failICE);
         this.lasticecandidate = false;
         this.options = options;