Put the Catalogue API tests earlier in the Travis build
Put the Catalogue API tests earlier in the Travis build

This is one of the longest tasks in the build matrix -- putting it
earlier means it runs in parallel, which should bring the overall build
time down.

Graphically, it's the difference between:

  XXX
  XXX
  XXX
     XXXXXXXX

and:

  XXXXXXXX
  XXX
  XXX
     XXX

wellcometrust/platform-api,wellcometrust/platform-api,wellcometrust/platform-api,wellcometrust/platform-api