Fix InitRTC work item link

When initializing a site, the generated link referencing the related RTC
Work item in the commit message pointed to an inexistent URL.

Modify the link generation using the URL cited in the Jazz RTC API v.2
[1].

[1] https://jazz.net/wiki/bin/view/Main/ResourceOrientedWorkItemAPIv2

Change-Id: Idfc5b901425ac63f478b3618519982fd2b0bc17c