More parameters for openstack-mediacheck job

Two new parameters where added: OBS_PROJECT and OBS_TYPE. Together they
constitute the download URL. They will be used with trigger jobs to be
able to check multiple OBS repositories containing ISO images. Mediacheck
jobs names also include the project name. Added triggers for the following
IBS projects:

 - Devel:Cloud:1.0
 - Devel:Cloud:2.0
 - Devel:Cloud:2.5