MT#64172 enable use_session = 0 for all API and JWT realms

* this disables $c->user_exists to result in successful auth
  if correct session is provided.

Change-Id: Id91b88f6f30dcca6a7b40eb61a23e2bbdabce7dd
(cherry picked from commit 6003c3bab4)

lib/NGCP/Panel.pm

@@ -179,6 +179,7 @@ __PACKAGE__->config(
                 user_model => 'DB::admins',
                 store_user_class => 'NGCP::Panel::Authentication::Store::RoleFromRealm',
             },
+            use_session => 0,
         },
         api_admin => {
             credential => {
@@ -278,6 +279,7 @@ __PACKAGE__->config(
                 user_model => 'DB::provisioning_voip_subscribers',
                 store_user_class => 'NGCP::Panel::Authentication::Store::RoleFromRealm',
             },
+            use_session => 0,
         },
         api_admin_jwt => {
             credential => {
@@ -295,6 +297,7 @@ __PACKAGE__->config(
                 user_model => 'DB::admins',
                 store_user_class => 'NGCP::Panel::Authentication::Store::RoleFromRealm',
             },
+            use_session => 0,
         },
         api_admin_system => {
             credential => {