feat(etcd-discovery): Add support to etcd-bootstrap for etcd-discovery
bump(coreos-init): Use commit 48dd41bd3427d5dbc60e4e573cf861ae106332ca

Bump coreos-init ebuild to 0.0.1-r37
fix(etcd-bootstrap): Use higher election timeout on EC2
squash! Bump coreos-init ebuild to 7baa3e940b094accb7fb9ca344aafba69a13a732