fix coordinator leader proxy in druid console server (#17)

* fix coordinator leader proxy in druid console server
Druid coordinator leader API includes scheme after [this change](apache/druid@2ecebb3#diff-2ed9a00e63ba80d914302e0f4b2a18b4R74). This fix handles that case instead of breaking and loading nothing

* build fix: tested with node 6 and 8 lts versions, updated dependencies as necessary, still a couple of failing tests locally

* remove unnecessary line

* simplify

* use zk stuff from locators package instead of internal zookeeperLocator.js

* i guess this gets added too?

* update express from 3.x to 4.x, some other npm dependencies, mild refactor of server code

* formatting

* cleanup

* fix tests after were broken by c96565b and never updated

* run unit-tests in travis with headless chrome, junit output

* travis fix

* another travis fix, sudo required due to travis-ci/travis-ci#8836

.travis.yml

@@ -1,2 +1,8 @@
 language: java
-sudo: false
+sudo: required
+dist: trusty
+addons:
+  chrome: stable
+before_install:
+  - # start your web application and listen on `localhost`
+  - google-chrome-stable --headless --disable-gpu --remote-debugging-port=9222http://localhost &

bower.json

@@ -11,14 +11,15 @@
     "ng-clip": "~0.1.3",
     "moment": "~2.9.0",
     "walltime-js": "~0.2.0",
-    "jQuery": "~2.1.4",
+    "jQuery": "~3",
     "angular-mocks": "~1.3",
     "ng-csv": "~0.1.0",
     "angular-bootstrap": "~0.12",
     "bootstrap": "~3.1.1",
     "font-awesome": "~4.2",
     "angular-ui-router": "~0.2",
-    "angular-local-storage": "~0.1.5"
+    "angular-local-storage": "~0.1.5",
+    "angular-sanitize": "~1.3"
   },
   "devDependencies": {},
   "private": true,