Golang Tip is broken on travis
Golang Tip is broken on travis

Remove testing against golang tipa and make sure we test against the
latest 1.8 and 1.9 releases.

Signed-off-by: Roman Mohr <6da0130c5aeef94e5bbaabadbf8017270be25c64@redhat.com>

kubevirt/kubevirt,davidvossel/kubevirt,fabiand/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,stu-gott/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt,fabiand/kubevirt,davidvossel/kubevirt,davidvossel/kubevirt,rmohr/kubevirt,stu-gott/kubevirt,rmohr/kubevirt