CDK-283: Run hadoop-1 tests on default artifacts.

This updates the Travis CI config to run hadoop-1 tests on the default
artifacts produced by building against hadoop-2 dependencies. This tests
the binary compatibility of Kite with both versions.

The hadoop-1 profile no longer builds artifacts, and should only be used
for testing with:
```
  mvn test -Dhadoop.profile=1 <other options>
```