Avoid html escaping while saving vmsettings in backup_details (#11900)

Author: abh1sar

server/src/main/java/org/apache/cloudstack/backup/BackupManagerImpl.java

@@ -168,6 +168,7 @@
 import com.cloud.vm.dao.VMInstanceDao;
 import com.cloud.vm.dao.VMInstanceDetailsDao;
 import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import com.google.gson.reflect.TypeToken;
 import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
 import org.apache.commons.lang3.builder.ToStringStyle;
@@ -399,7 +400,8 @@ public Map<String, String> getBackupDetailsFromVM(VirtualMachine vm) {
             settings.put(detail.getName(), detail.getValue());
         }
         if (!settings.isEmpty()) {
-            details.put(ApiConstants.VM_SETTINGS, new Gson().toJson(settings));
+            Gson gson = new GsonBuilder().disableHtmlEscaping().create();
+            details.put(ApiConstants.VM_SETTINGS, gson.toJson(settings));
         }
 
         String nicsJson = getNicDetailsAsJson(vm.getId());