Finish linux:system:user:sudo parametrization

Change-Id: Idf650767d379603853d5f4691c13cf37f2b7645f
diff --git a/openssh/server/team/members/ashishkin.yml b/openssh/server/team/members/ashishkin.yml
index b85c953..9f74171 100644
--- a/openssh/server/team/members/ashishkin.yml
+++ b/openssh/server/team/members/ashishkin.yml
@@ -5,7 +5,7 @@
         ashishkin:
           enabled: true
           name: ashishkin
-          sudo: false
+          sudo: ${_param:linux_system_user_sudo}
           full_name: Aleksei Shishkin
           home: /home/ashishkin
           email: ashishkin@mirantis.com