add args & kwargs capabilities into admin.py

[shadeimi]

from celery.execute import send_task
from django.contrib import admin
from djcelery import admin as djcelery_admin
from djcelery.models import PeriodicTask
import json

class ExtendedPeriodicTaskAdmin(djcelery_admin.PeriodicTaskAdmin):
actions = djcelery_admin.PeriodicTaskAdmin.actions + ['run_task']

def run_task(self, request, queryset):
    if request.user.is_admin:
        for task in queryset.all():
            send_task(task.task, args=json.loads(task.args), kwargs=json.loads(task.kwargs))
        self.message = 'Tasks are running'
    else:
        self.message = 'You must be an admin to perform this action.'
run_task.short_description = 'Run Task'

admin.site.unregister(PeriodicTask)
admin.site.register(PeriodicTask, ExtendedPeriodicTaskAdmin)