Added User password_reset spec and some refactor

*Make returned error in errors array
*Use constants

app/components/users/javascripts/init_component.js

@@ -33,7 +33,7 @@
               Ext.Msg.alert("Success", "New Password: "+data.password);
             },
             error: function(data,textStatus) {
-              Ext.Msg.alert( "Error", JSON.parse(data.responseText)["error"]);
+              Ext.Msg.alert( "Error", JSON.parse(data.responseText)["errors"][0]);
             }
           });
         }

app/controllers/api/v1/users_controller.rb

@@ -1,18 +1,22 @@
 require 'securerandom'
 class Api::V1::UsersController < Api::V1::BaseController
+  CANNOT_MANAGE = "You do not have the permission to manager users"
+  NOT_FOUND = "User not found"
+  NOT_ALLOWED = "Not allowed to reset your own password in this fashion"
+  PASS_LENGTH = 8
 
   def password_reset
     if can? :manage, User
       user = User.find_by_id(params[:user_id])
-      render :json => { "error" => "User not found"}, :status => 404 and return if user.nil?
-      render :json => { "error" => "Not allowed to reset your own password in this fashion."}, :status => 403 and return if user.id == current_user.id
+      render :json => { "errors" => [NOT_FOUND]}, :status => 404 and return if user.nil?
+      render :json => { "errors" => [NOT_ALLOWED]}, :status => 403 and return if user.id == current_user.id
 
-      new_pass = SecureRandom.hex[0,8]
+      new_pass = SecureRandom.hex[0,PASS_LENGTH]
       user.password = new_pass
       user.save
       render :json => { "password" => new_pass}, :status => 200 and return
     else
-      render :json => { "error" => "You do not have the permission"}, :status => 403 and return
+      render :json => { "errors" => [CANNOT_MANAGE]}, :status => 403 and return
     end
   end