fix(ngModelOptions): initialize ngModelOptions in prelink

Input controls require `ngModel` which in turn brings in the `ngModelOptions`
but since ngModel does this initialization in the post link function, the
order in which the directives are run is relevant.

Directives are sorted by priority and name but `ngModel`, `input` and `textarea`
have the same priority. It just happens that `textarea` is alphabetically
sorted and so linked before `ngModel` (unlike `input`).

This is a problem since inputs expect `ngModelController.$options`
to exist at post-link time and for `textarea` this has not happened.

This is solved easily by moving the initialization of `ngModel` to the
pre-link function.

Closes #7281
Closes #7292

Author: shahata

src/ng/directive/input.js

@@ -1973,22 +1973,24 @@ var ngModelDirective = function() {
   return {
     require: ['ngModel', '^?form', '^?ngModelOptions'],
     controller: NgModelController,
-    link: function(scope, element, attr, ctrls) {
-      // notify others, especially parent forms
+    link: {
+      pre: function(scope, element, attr, ctrls) {
+        // Pass the ng-model-options to the ng-model controller
+        if (ctrls[2]) {
+          ctrls[0].$options = ctrls[2].$options;
+        }
 
-      var modelCtrl = ctrls[0],
-          formCtrl = ctrls[1] || nullFormCtrl;
+        // notify others, especially parent forms
 
-      formCtrl.$addControl(modelCtrl);
+        var modelCtrl = ctrls[0],
+            formCtrl = ctrls[1] || nullFormCtrl;
 
-      // Pass the ng-model-options to the ng-model controller
-      if ( ctrls[2] ) {
-        modelCtrl.$options = ctrls[2].$options;
-      }
+        formCtrl.$addControl(modelCtrl);
 
-      scope.$on('$destroy', function() {
-        formCtrl.$removeControl(modelCtrl);
-      });
+        scope.$on('$destroy', function() {
+          formCtrl.$removeControl(modelCtrl);
+        });
+      }
     }
   };
 };

test/ng/directive/inputSpec.js

@@ -642,6 +642,17 @@ describe('input', function() {
       expect(scope.name).toEqual('a');
     });
 
+    it('should allow overriding the model update trigger event on text areas', function() {
+      compileInput(
+          '<textarea ng-model="name" name="alias" '+
+            'ng-model-options="{ updateOn: \'blur\' }"'+
+          '/>');
+
+      changeInputValueTo('a');
+      expect(scope.name).toBeUndefined();
+      browserTrigger(inputElm, 'blur');
+      expect(scope.name).toEqual('a');
+    });
 
     it('should bind the element to a list of events', function() {
       compileInput(