Make travis build and test modules in parallel (#1956)
Make travis build and test modules in parallel (#1956)

* Make travis build and test modules in parallel

* Fix build matrix

* Change up build matrix again

graknlabs/grakn,graknlabs/grakn,lolski/grakn,graknlabs/grakn,lolski/grakn,lolski/grakn,lolski/grakn,graknlabs/grakn