[MRM-1966] Fixing error for 0 value of daysOlder entry

UI did not allow to enter value 0 for the daysOlder value.

archiva-modules/archiva-web/archiva-webapp/src/main/webapp/js/archiva/admin/repository/maven2/repositories.js

@@ -300,7 +300,7 @@ function(jquery,i18n,jqueryTmpl,bootstrap,jqueryValidate,ko) {
       rules: {
         retentionTime : {
           digits: true,
-          min: 1
+          min: 0
         },
         retentionCount : {
           digits: true,
@@ -1327,4 +1327,4 @@ function(jquery,i18n,jqueryTmpl,bootstrap,jqueryValidate,ko) {
     return ($.isArray(managedRepository) && managedRepository.length>0) ? managedRepository[0]:new ManagedRepository();
   }
 
-});
+});