monitor: Edge testing of urls

Adds edgetest and edgebot software types, where edgetest is a software type
to request by user and requests by itself edgebot, which does the monitoring
work.

Based on Rafael Monnerat <rafael@nexedi.com>
1 job for 1.0 in 0 seconds
Status Job ID Name Coverage
  External
canceled SlapOS.SoftwareReleases.IntegrationTest-Master

02:03:02