Unnecessary dependency on islandora_defaults

[ajstanley]

What steps does it take to reproduce the issue?

• Run drush en islandora_mirador after running composer require islandora/islandora_mirador on a fresh build (Playbook, in my case)

• What happens?

In UnmetDependenciesException.php line 100:
                                                                                                                                                                                     
  Configuration objects provided by <em class="placeholder">islandora_mirador</em> have unmet dependencies: <em class="placeholder">core.entity_view_display.node.islandora_object.  
  mirador (islandora_defaults)</em>     

Deleting the offending lines allows the module to install, and it all seems to work as it's meant to.

Which version of Islandora are you using?

Islandora 2.4.5

Any related open or closed issues to this bug report?

Screenshots:

[alxp]

There's an open PR for this, just moving the configs to optional: #9

[alxp]

Resolved with PR