Build schedule of ovirt-appliance_ovirt-3.6_build-artifacts-el7-x86_64

[Fabian Deutsch]

Hey Ryan & Tolik,

could you change the build schedule of the following to jobs to be
built on a weekly basis?

ovirt-appliance_ovirt-3.6_build-artifacts-el7-x86_64
ovirt-appliance_ovirt-master_build-artifacts-el7-x86_64

Currently they are just triggered manually, but we should have regular
updates to ensure that we get some platform updates into the images.

Thanks
fabian