DEPL-6924: Set default values on objects created with DeployitDescriptorRegistry.newInstance.
DEPL-6949: add properties required by the DarPackager/ManifestWriter even if they don't exist on XLD
Upgraded dependencies to XLD 4.5.1.
Handle cause of the InvocationTargetException instead of InvocationTargetException in PluginFirstClassloaderInvocationHandler.
Added license header and nicer error messages.
DEPL-4899: Introduced RemotePropertyDescriptor shadow class that has support for hidden properties.
DEPL-6974: PreemptiveAuthenticationInterceptor marked as serializable.
DEPL-6974: Removed SlaveRemoteDescriptorRegistry - plugin now uses DeployitServer.getDescriptorRegistry() to initialize remote booter.