refactor(responsibilty): update initialization

Only use the create factory method, now.

#44,#187

lib/crc/crc-model.js

@@ -1,12 +1,12 @@
 const CrcClass = require("./crc-class");
 const CrcMeta = require("./crc-meta");
 const CrcResponsibility = require("./crc-responsibility");
-const {get} = require("lodash");
 
 /**
  * Default parameters for a CrcModel NullObject.
  *
  * @private
+ * @ignore
  */
 
 const defaultConstructorParams = {
@@ -61,9 +61,7 @@ class CrcModel {
     this.class = params.class;
     this.collaborators = params.collaborators;
     this.meta = params.meta;
-    this.responsibilities =
-      get(CrcResponsibility.create(params.class), "all") || [];
-    CrcResponsibility.assign(this.class);
+    this.responsibilities = CrcResponsibility.create(this.class);
   }
 
   /**