Stop testing with golang 1.8
Stop testing with golang 1.8

No one is using this any longer.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #894
Approved by: TomSweeneyRedHat

TomSweeneyRedHat/buildah,projectatomic/buildah,rhatdan/buildah,ipbabble/buildah,nalind/buildah-1,TomSweeneyRedHat/buildah,nalind/buildah-1,ipbabble/buildah,rhatdan/buildah,nalind/buildah,rhatdan/buildah,nalind/buildah-1,projectatomic/buildah,projectatomic/buildah,nalind/buildah,TomSweeneyRedHat/buildah