Set default core services update to test template

A new template 'ics-ans-core @ DHCP test' was created to test
the DNS and DHCP deployment. This is the one o use by default.

The "real" template should be used in the production settings.cfg

app/settings.py

@@ -69,4 +69,4 @@ DOCUMENTATION_URL = 'http://ics-infrastructure.pages.esss.lu.se/csentry/index.ht
 
 # AWX job templates
 AWX_JOB_ENABLED = False
-AWX_CORE_SERVICES_UPDATE = 'ics-ans-core CSENTRY refresh'
+AWX_CORE_SERVICES_UPDATE = 'ics-ans-core @ DHCP test'