added custom module dependencies enforced section under install/config for #1707 (#812)

modules/islandora_breadcrumbs/config/install/islandora.breadcrumbs.yml

@@ -1,3 +0,0 @@
-maxDepth: -1
-includeSelf: FALSE
-referenceField: field_member_of

modules/islandora_breadcrumbs/config/install/islandora_breadcrumbs.breadcrumbs.yml

@@ -0,0 +1,9 @@
+maxDepth: -1
+includeSelf: FALSE
+referenceField: field_member_of
+dependencies:
+  module:
+    - islandora
+  enforced:
+    module:
+      - islandora_breadcrumbs

modules/islandora_breadcrumbs/config/schema/islandora_breadcrumbs.schema.yml

@@ -1,4 +1,4 @@
-islandora.breadcrumbs:
+islandora_breadcrumbs.breadcrumbs:
   type: config_object
   mapping:
     maxDepth:

modules/islandora_breadcrumbs/src/IslandoraBreadcrumbBuilder.php

@@ -41,7 +41,7 @@ class IslandoraBreadcrumbBuilder implements BreadcrumbBuilderInterface {
    */
   public function __construct(EntityTypeManagerInterface $entity_manager, ConfigFactoryInterface $config_factory) {
     $this->nodeStorage = $entity_manager->getStorage('node');
-    $this->config = $config_factory->get('islandora.breadcrumbs');
+    $this->config = $config_factory->get('islandora_breadcrumbs.breadcrumbs');
   }
 
   /**