Comment 0 for bug 1554982

Given we have a plugins with a task_id collided with another task_id in the same plugins.
fpb doesn't complain about it, but it should've.

Even though fuel plugins --install prints errors about duplicated task_ids, the plugin ends up installed.
But it doesn't work, because information from it only partially was inserted into DB.
Exit code of such a faulty installation ends up 0.

Step to reproduce
  Install a plugins with duplicated task_id

Expected behavior:
   fpb doesn't build a plugin with duplicated task_id

   the plugin isn't installed

   fuel plugins returns non-zero exit code

Actual behavior:
    fpb doesn't complain about duplicated task_id and build plugin

    the plugin is installed

    fuel plugins returns 0