Renamed duplicate test and added "pip install nose" to .travis.yml

Author: fblundun

.travis.yml

@@ -7,6 +7,7 @@ install:
   - "pip install python-dateutil"
   - "pip install httmock"
   - "pip install freezegun"
+  - "pip install nose"
   - "pip install -r requirements.txt"
 # command to run tests
 script: nosetests --exe

snowplow_tracker/test/unit/test_payload.py

@@ -77,9 +77,9 @@ def test_get_transaction_id(self):
     @freeze_time("1970-01-01 00:00:01")
     def test_get_timestamp(self):
         p = payload.Payload()
-        self.assertTrue(p.context["dtm"] == 1000)   # 1970-01-01 00:00:01 in ms
+        self.assertEquals(p.context["dtm"], 1000)   # 1970-01-01 00:00:01 in ms
 
-    def test_set_timestamp(self):
+    def test_set_timestamp_2(self):
         p = payload.Payload()
         p.set_timestamp(0)
         self.assertEquals(p.context["dtm"], 0)