null constructor of type parameter is needed

Author: Daan Hoogland

plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/LdapTrustMapVO.java

@@ -55,6 +55,10 @@ public class LdapTrustMapVO implements InternalIdentity {
     @Enumerated(value = EnumType.ORDINAL)
     private Account.Type accountType;
 
+
+    public LdapTrustMapVO() {
+    }
+
     public LdapTrustMapVO(long domainId, LdapManager.LinkType type, String name, Account.Type accountType, long accountId) {
         this.domainId = domainId;
         this.type = type;