GUACAMOLE-742: Merge use "data-disabled" instead of "disabled" for directive attributes.

guacamole/src/main/webapp/app/form/templates/form.html

@@ -9,7 +9,7 @@
         <div class="fields">
             <guac-form-field ng-repeat="field in form.fields" namespace="namespace"
                              ng-if="isVisible(field)"
-                             disabled="disabled"
+                             data-disabled="disabled"
                              field="field" model="values[field.name]"></guac-form-field>
         </div>
 

guacamole/src/main/webapp/app/login/templates/login.html

@@ -27,7 +27,7 @@
                         namespace="'LOGIN'"
                         content="remainingFields"
                         model="enteredValues"
-                        disabled="submitted"></guac-form>
+                        data-disabled="submitted"></guac-form>
                 </div>
 
                 <!-- Login/continue button -->