update sauce labs config so e2e tests can run against pull requests

Author: DaftMonk

.travis.yml

@@ -4,8 +4,8 @@ node_js:
   - '0.11'
 env:
   global:
-    - secure: hwJX8w4D15UPdU4UIS+iB4XC/lxmh/y6m3IN5Ia5ha++rHs2JZ3FVOPdosb03fMoXYpR2682pzvTEHrZw6Ks0dpmJs3KJWB4kgsK7slfKyKA38j8rDvSU+iBfiB2lo8lTmj9g5Ua8c2hiJcw6EMt8VlLlhgoJLy3heycPTsW04A=
-    - secure: gl/h7p5S+hfR7Cv2tl53c+biW3Mfhh6P4VI4VxrPFj5Mm1ha89dbMYjPn0PuLkmjaZ2+n9siU7j6lwlOdyWGAo0tkPtK/EC62L2Q938O204jD8VXnvjQ8kbP9zcjHogicD+elF0X5hvnXApW9I7nOZIs59V5Pp8DXkuHEWMIo8U=
+    - SAUCE_USERNAME=fullstack-ci
+    - SAUCE_ACCESS_KEY=1a527ca6-4aa5-4618-86ce-0278bf158cbf
 addons:
   sauce_connect: true
 before_install: