Ensure the clj tests are run
Ensure the clj tests are run

Separate the rebar3 commands in the travis make target and be explicit
about which modules to test, namely clj-tests and prop_lfe_doc.

oubiwann/lfe,arpunk/lfe,bsmr-erlang/lfe,arpunk/lfe,bsmr-erlang/lfe,oubiwann/lfe