NMS-6667 and NMS-6668: Initial revision of LdapMonitor and LdapsMonitor

http://issues.opennms.org/browse/NMS-6667
http://issues.opennms.org/browse/NMS-6668
Copy and Paste error

    -| `searchfilter` | The destination port where the NTP request shall be sent. | optional | `(objectclass=*)`
    +| `searchfilter` | The destination port where the LDAP request shall be sent. | optional | `(objectclass=*)`