Adds pxe field to host in admin, minor refactor

mdbsite/urls.py

@@ -2,14 +2,14 @@ from django.conf.urls import include, url
 from django.contrib import admin
 from django.contrib.staticfiles.urls import staticfiles_urlpatterns
 from django.views.generic.base import RedirectView
-from mdb.api.views import ValidatePuppetHostSecret
+from mdb.api.views import HostPXEValidate
 
 admin.autodiscover()
 
 urlpatterns = [
     url(r'^$', RedirectView.as_view(url='admin/', permanent=True)),
     url(r'^admin/', include(admin.site.urls)),
-    url(r'^api/validate-host-secret/', ValidatePuppetHostSecret.as_view(), name='api-validate-host-secret')
+    url(r'^api/validate-host-secret/', HostPXEValidate.as_view(), name='api-validate-host-secret')
 ]
 
 urlpatterns += staticfiles_urlpatterns()