Fix set_facts visibility

Move set_facts to the preinstall scope, so every role
may see it. For example, network plugins to see the etcd_endpoint.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

roles/etcd/tasks/main.yml

@@ -1,5 +1,4 @@
 ---
-- include: set_facts.yml
 - include: install.yml
 - include: set_cluster_health.yml
 - include: configure.yml