Fix location for swift-recon-cron

* Perform a which to find where swift-recon-cron is
* Setup the cron job based on this location

Fixes #643
Merge pull request #644 from andymcc/recon_fix

Fix location for swift-recon-cron
Stop logstash-web and prevent it from starting on boot (GH646)
Disable XML API tests

XML APIs are on the road to deprecation so lets disable the tests.

Related: #653
Merge pull request #654 from hughsaunders/disable_xml_tests

Disable XML API tests
Merge pull request #649 from odyssey4me/GH646_disable_logstash-web

Stop logstash-web and prevent it from starting on boot