Functional JavaScript tests are failing

The failing of the tests has multiple reasons:

1. In ConditionalFieldDateTimeTest::testVisibleValueWidget the date filled in is Y-m-d while the date field requires d-m-Y format in the POST request. The actual date for the widget wasn't actually set in the component edit form. Changing this to d-m-Y fixes it.

   However when later setting the widget in ::changeField this is done with jQuery which requires 'Y-m-d' format. So we do need 'Y-m-d' format there.

2. ConditionalFieldTextTextareaTests::testVisibleValueXor and ConditionalFieldTextTextareaTests::testVisibleValueAnd are failing randomly because $this->randomString() is used which generates characters that randomly conflict with the jQuery code being executed (missing closing brackets etc). Obviously this could be escaped correctly, but I thought it would be easier to use $this->randomMachineName() instead.
3. I also discovered that tests are showing strict schema checking exceptions (see image), which in itself don't break any tests but i discovered that there is something wrong with the configuration schema.
   

       value_form:
         type: sequence
         label: 'Values from widget'
         sequence:
           # Since it sub-config of field.widget.third_party, get there.
           type: field.value.[%parent.%parent.%parent.%parent.%parent.%parent.type]
           label: 'Value from widget'
   

   The type refers to the widget type, not the field type. The widget type doesn't hold the schema of the field properties. We need the field type for that. Possibly this used to work, but stopped working after this patch was committed: https://www.drupal.org/project/drupal/issues/2370305#comment-9371075

   The actual field type is actually nowhere available in the configuration tree, and needs to be added to the conditional fields configuration. I'll create a follow up.

For some reason it doesn't seem to be possible to upload anything right now on drupal.org. I'll try again later with the patch
It did work with the form submit. Just the Ajax seemed to be broken.

This is working locally. The only thing I can think of is that this isn't working because the testbot is set to use the American date format m-d-Y.