Run all small tests

Author: shs96c

.travis.yml

@@ -82,7 +82,7 @@ matrix:
     - env: MARIONETTE=1 BUCK="test firefox-test"
       <<: *java
       <<: *firefox-nightly
-    - env: BUCK="test java-small-tests"
+    - env: BUCK="test --labels small"
       <<: *java
     - env: BUCK="test internal-grid-test"
       <<: *java