Allow modification of user vm details if user.vm.readonly.details is empty

Author: Pearl1594

engine/schema/src/main/resources/META-INF/db/schema-420to421.sql

@@ -242,3 +242,6 @@ INSERT IGNORE INTO `cloud`.`configuration` VALUES ('Advanced', 'DEFAULT', 'manag
 INSERT IGNORE INTO `cloud`.`configuration` VALUES ('Advanced', 'DEFAULT', 'management-server', 'vmware.hung.wokervm.timeout', '7200', 'Worker VM timeout in seconds');
 INSERT IGNORE INTO `cloud`.`configuration` VALUES ("Alert", 'DEFAULT', 'management-server', "alert.smtp.connectiontimeout", "30000", "Socket connection timeout value in milliseconds. -1 for infinite timeout.");
 INSERT IGNORE INTO `cloud`.`configuration` VALUES ("Alert", 'DEFAULT', 'management-server', "alert.smtp.timeout", "30000", "Socket I/O timeout value in milliseconds. -1 for infinite timeout.");
+
+-- Update the value of user.vm.readonly.details record in the configuration table to "" if it is NULL
+UPDATE `cloud`.`configuration` SET value = '' WHERE name = 'user.vm.readonly.details' AND value IS NULL;

server/src/main/java/com/cloud/configuration/ConfigurationManagerImpl.java

@@ -1006,7 +1006,7 @@ public Configuration updateConfiguration(final UpdateCfgCmd cmd) throws InvalidP
         value = value.trim();
 
         if (value.isEmpty() || value.equals("null")) {
-            value = (id == null) ? null : "";
+            value = (id == null && !name.equals("user.vm.readonly.details")) ? null : "";
         }
 
         final String updatedValue = updateConfiguration(userId, name, category, value, scope, id);