Add rethinnkdb connection option to nestedUnit controller.

Author: Dr. Safi

module/reusableNestedUnit/Controller.class.js

@@ -16,7 +16,8 @@ import { mix } from 'mixwith'
 export default ({
     methodInstanceName,
     Superclass = EventEmitter, // defaulting to EventEmitter and not Object / Function because extending Object/Function manipulates this prototype in new calls for some reason.
-    mixin
+    mixin, 
+    rethinkdbConnection = Superclass.rethinkdbConnection
 }) => {
     let mixinArray = [/*commonMethod*/]
     let self = 
@@ -35,6 +36,8 @@ export default ({
         @superclassInstanceContextPattern() // applied on the mixin i.e. specific controller.
         class ReusableController extends mix(Superclass).with(...mixinArray) {
 
+            static rethinkdbConnection = rethinkdbConnection
+
             @cacheInstance({ 
                 cacheArrayName: 'nestedUnit',
                 keyArgumentName: 'nestedUnitKey'

module/reusableNestedUnit/entrypoint.js

@@ -25,7 +25,8 @@ let counter = [] // allows to have a unique set of relations among different nes
 function createStaticInstanceClasses({
     Superclass, /* Usually the higher Application class */
     implementationType,
-    cacheName = false /* {Boolean || String} */
+    cacheName = false, /* {Boolean || String} */
+    rethinkdbConnection
 } = {}) {
     // Used as caching key.
     let automaticCacheNaming;
@@ -88,7 +89,8 @@ function createStaticInstanceClasses({
     let Controller = ControllerFunc({
         methodInstanceName: cacheName,
         Superclass,
-        mixin: implementationConfig.ControllerMixin
+        mixin: implementationConfig.ControllerMixin, 
+        rethinkdbConnection
     })
     let NestedUnit = NestedUnitFunc({ Superclass: Controller })
     let Unit = UnitFunc({ Superclass: Controller })