Limit ip-routing and snat to seed hosts only

Even if kayobe itself limit [1] ip-routing and snat playbooks to the
seed hosts only the playbooks should have same hosts specified.

TrivialFix

1. https://github.com/openstack/kayobe/blob/52d7523c0c3e6a6f7f321459b9d7fc055282057f/kayobe/cli/commands.py#L610



Change-Id: I35788e69eeace41d5bcbf89922145f1c35f58ff2
Signed-off-by: Maksim Malchuk <maksim.malchuk@gmail.com>

ansible/ip-routing.yml

@@ -2,7 +2,7 @@
 # Enable IP routing in the kernel.
 
 - name: Ensure IP routing is enabled
-  hosts: seed:overcloud
+  hosts: seed
   tags:
     - ip-routing
   roles:

ansible/snat.yml

@@ -2,7 +2,7 @@
 # Enable SNAT using iptables.
 
 - name: Ensure SNAT is configured
-  hosts: seed:overcloud
+  hosts: seed
   tags:
     - snat
   vars: