Implement review comment (conditional)

postgres/client/init.sls

@@ -39,9 +39,11 @@ postgresql-{{ bin }}-altinstall:
     - onlyif: test -f {{ path }}
     - require:
       - pkg: postgresql-client-libs
+      {%- if grains['saltversioninfo'] < [2018, 11, 0, 0] %}
     - retry:
         attempts: 2
         until: True
+      {%- endif %}
 
     {%- endfor %}
 {%- endif %}