Add functional test coverage for files API

Adds simple validation of the new files API to an existing
test

Change-Id: Ibd94532fad216516e98bbd859547f8d8f8f851fa
blueprint: files-show
Depends-On: Ib7d033a660fe294bf3f7b42e4aa7020149ce24c1
1 file changed
tree: fd03607e48f653b339fc7437bb8c6b512d18fb53
  1. common/
  2. functional/
  3. scenario/