Update jest to produce a junit report for tests (jaegertracing#723)

* Update jest to produce a junit report for tests

Signed-off-by: Kevin Earls <kearls@redhat.com>

* Fix formatting to make yarn lint happy

Signed-off-by: Kevin Earls <kearls@redhat.com>
Signed-off-by: vvvprabhakar <vvvprabhakar@gmail.com>

packages/jaeger-ui/package.json

@@ -25,6 +25,7 @@
     "enzyme-adapter-react-16": "^1.2.0",
     "enzyme-to-json": "^3.3.0",
     "http-proxy-middleware": "^0.19.1",
+    "jest-junit": "^10.0.0",
     "less": "3.9.0",
     "less-loader": "4.1.0",
     "less-vars-to-js": "^1.2.1",
@@ -121,6 +122,10 @@
       "!src/utils/test/**/*.js",
       "!src/demo/**/*.js",
       "!src/types/*"
+    ],
+    "reporters": [
+      "default",
+      "jest-junit"
     ]
   },
   "browserslist": [