Use it for the save, delete, push testing for composer-cli
tests. Otherwise the test runs fine the first time and fails after that
if you don't re-install the test environment.
Related: rhbz#1678937
Passing ?limit=0 to the blueprints/list, blueprints/changes,
projects/list, modules/list should always return the total possible
results, not 0.
Also move the composer-cli test_diff to the end so that it will work
consistently. Do this by naming it test_z_diff.
(cherry picked from commit 972b5c4142)
These depend on there being a freshly installed lorax-composer API
server running, if there is no /run/weldr/api.socket they will be
skipped.
(cherry picked from commit 7700ae3135)
