Set public to true for websocket tests

A side effect of LDAP auth tests was breaking these other tests,
that should have already forced public instance in their pre-condition.

test/server.js

@@ -37,6 +37,11 @@ describe("Server", () => {
 	describe("WebSockets", () => {
 		let client;
 
+		before((done) => {
+			Helper.config.public = true;
+			done();
+		});
+
 		beforeEach(() => {
 			client = io(webURL, {
 				path: "/socket.io/",