Add Luis Tomas to Kuryr and OpenStack owners

playbooks/openstack/OWNERS

@@ -1,8 +1,10 @@
 # approval == this is a good idea /approve
 approvers:
+  - luis5tb
   - tomassedovic
   - tzumainn
 # review == this code is good /lgtm
 reviewers:
+  - luis5tb
   - tomassedovic
   - tzumainn

roles/kuryr/OWNERS

@@ -1,8 +1,10 @@
 # approval == this is a good idea /approve
 approvers:
+  - luis5tb
   - tomassedovic
   - tzumainn
 # review == this code is good /lgtm
 reviewers:
+  - luis5tb
   - tomassedovic
   - tzumainn