Add sleep after salt.minion.ca

Change-Id: Ie9b1c3f99bc9ecd966ee06136fc629cdece3e809
Related-PROD: PROD-25986 (PROD:25986)
diff --git a/config-drive/master_config.yaml b/config-drive/master_config.yaml
index 51649bb..fde9d28 100644
--- a/config-drive/master_config.yaml
+++ b/config-drive/master_config.yaml
@@ -226,6 +226,8 @@
       salt-call --timeout=120 test.ping
       # Run salt.minion.ca to prepare CA certificate before salt.minion.cert is used
       salt-call ${SALT_OPTS} state.sls salt.minion.ca
+      # Add sleep for completion of postponed restart of salt-minion. PROD-25986
+      sleep 15
       salt-call ${SALT_OPTS} state.sls salt.minion
       # Wait for salt-minion to wake up after restart
       sleep 5