updating server self for pg

upgrade-edge-postgres.yml

diff --git a/upgrade-edge-postgres.yml b/upgrade-edge-postgres.yml
index 3c93989..b3f2fcb 100644
--- a/upgrade-edge-postgres.yml
+++ b/upgrade-edge-postgres.yml
@@ -15,6 +15,7 @@
       msg: "Upgrading component ps on {{ inventory_hostname }} ( {{ ansible_hostname }} )"
 
   roles:
+  - { role: apigee-opdk-server-self, server_types: ['ps'], tags: ['self']  }
   - { role: apigee-opdk-set-reachable, reachability: False, server_types: ['ps'] }
   - { role: apigee-opdk-setup-silent-installation-config, opdk_version: "{{ upgrade_from_opdk_version }}" }
   - { role: apigee-opdk-stop-components, component_name: "edge-postgres-server", when: "opdk_version | version_compare('4.18.01', '==')" }
@@ -44,6 +45,7 @@
       msg: "Upgrading component ps on {{ inventory_hostname }} ( {{ ansible_hostname }} )"
   roles:
   - { role: apigee-opdk-modules }
+  - { role: apigee-opdk-server-self, server_types: ['ps'], tags: ['self']  }
   - { role: apigee-opdk-setup-silent-installation-config, opdk_version: "{{ upgrade_from_opdk_version }}" }
   - { role: apigee-opdk-stop-components, component_name: "edge-postgres-server", when: "opdk_version | version_compare('4.18.01', '==')" }
   - { role: apigee-opdk-stop-components, component_name: "apigee-postgresql", when: "opdk_version | version_compare('4.18.01', '==')" }