Make session lifetime options optional (fold in #730)

Author: ak684

replicated/config.yaml

@@ -1132,7 +1132,7 @@ spec:
             How long a login session stays valid without activity before the user must sign in again. Default is 259200 (3 days).
           type: text
           default: "259200"
-          required: true
+          required: false
           validation:
             regex:
               pattern: '^[1-9][0-9]*$'
@@ -1143,7 +1143,7 @@ spec:
             Maximum total lifetime of a login session before the user must sign in again, regardless of activity. Default is 604800 (7 days). Each forced re-login also re-authorizes the configured identity provider (for example, Bitbucket Data Center records a new authorized-application grant), so raising this reduces how often that happens.
           type: text
           default: "604800"
-          required: true
+          required: false
           validation:
             regex:
               pattern: '^[1-9][0-9]*$'