sandbox releases found

Seems like the "Has project releases" checkbox has reappeared on editing sandbox projects.

These projects are affected:
https://www.drupal.org/node/2265517
https://www.drupal.org/node/2285469
https://www.drupal.org/node/2299591
https://www.drupal.org/node/2312479
https://www.drupal.org/node/2312751

The authors are all Git vetted users, so either removing releases or promoting them to full projects, are good cleanups.

In project_release_node_validate(), when a Git vetted user selects sandbox, and has project releases, the "Sandbox projects may not have releases. "Has project releases" checkbox cleared." message correctly shows, but

        unset($form_state['input']['field_project_has_releases']);
        form_set_value($form['field_project_has_releases'], FALSE, $form_state);

works for previews, but not node save.

That should fix it. We might want to do a bit more with #states in project_release_form_node_form_alter() too.

Leaving open for cleaning up the projects in #4 and checking for more after deployment. The query is

SELECT * FROM field_data_field_release_project frp INNER JOIN field_data_field_project_type fpt ON fpt.entity_id = frp.field_release_project_target_id AND fpt.field_project_type_value = 'sandbox';

Not deploying yet because I want to be sure to run the existing BDD tests. This interaction does have a decent amount of testing already, but apparently not enough. My manual testing before would have been on node edit instead of node add. Git7site won't be working well enough to run tests until #968994: Multiple Values for listings of current companies and organizations makes it into a DB snapshot used by that site, I think it will be good tomorrow.

Now deployed on Drupal.org. Moving back to infra for project cleanup.

There are no new problem releases since #4. I went ahead and turned off releases for the projects that only had dev snapshots:
https://www.drupal.org/sandbox/anybody/2312479
https://www.drupal.org/sandbox/sinasalek/2312751
https://www.drupal.org/sandbox/janvandiepen/2299591

That leaves:
https://www.drupal.org/sandbox/nicholasalipaz/2285469
https://www.drupal.org/sandbox/andrewmacpherson/refererlinkblock

Which look like they are being used as full projects, so I'll make them full projects.

Now cleaned up.