rhbz#1176138 - update to v2.0.0-rc.1
NVR: etcd-2.0.0-1.rc1 (not built in koji yet)
This commit doesn't solve resolve rhbz#1176138 completely, as the package
update isn't quite working as expected. More work is needed on this.
Signed-off-by: Lokesh Mandvekar <lsm5@fedoraproject.org>