test: enable nock as needed

src/test/dockerproxy-test.js

@@ -13,6 +13,7 @@ const child_process = require('child_process'),
     constants = require('../constants.js'),
     dockerProxy = require('../dockerproxy.js'),
     expect = require('expect.js'),
+    nock = require('nock'),
     syslogServer = require('../../syslog.js');
 
 const DOCKER = `docker -H tcp://172.18.0.1:${constants.DOCKER_PROXY_PORT} `;
@@ -35,6 +36,7 @@ describe('Dockerproxy', function () {
 
     // create a container to test against
     before(async function () {
+        if (nock.isActive()) nock.restore(); // required to connect to the docker socket
         await setup();
         await syslogServer.start();
         await dockerProxy.start();