Add ldap binding to JavaScriptEvaluator when using pluginDestinationService-executableLdapDestinationServiceSettings

[coudot]

From http://tools.lsc-project.org/issues/721

I noticed that using a pluginDestinationService that execute against an executableLdapDestinationServiceSettings, it is not possible to make use of "ldap" binding

The ScriptableJndiServices is not istantiated. The pluginDestinationService is istantiated as org.lsc.plugins.connectors.executable.ExecutableLdapDestinationService that does not inherit from AbstractSimpleJndiService

For this reason the check

&& task.getDestinationService() instanceof AbstractSimpleJndiService

inside JScriptEvaluator.java fails.

In my opinion it would be great being able to query the destination even with this plugin.