Do not report fail if the link goes to a product splash page on purpose

[baruza]

The test should be able to distinguish between links that go to the product splash page because they are redirected because the original link does not work (=report these as fail) and links that go to the product splash page on purpose, for example:

https://access.redhat.com/documentation/en/red_hat_openstack_platform/

See: http://ccs-jenkins.gsslab.brq.redhat.com:8080/view/Tests%20-%20Ceph/job/doc-Red_Hat_Ceph_Storage_3_master-Ceph_Block_Device_to_OpenStack%20(test)/lastSuccessfulBuild/artifact/results.html for details