#2 Add black-box invocation support

[E. Victor Sanchez]

This feature has two main goals:

1 Black-box function (procedure/method) invocation. Parameters may be of any type. Parameter cardinality is determined by the operation to be invoked. Mechanisms to achieve arbitrary number of parameter passing might be worth exploring.

2 Transformation invocations (either Black-box or not), which includes allowing remote invocations. Parameters can only be models. An exception could be a Map<String, String> for configuration information passing, equivalent to parameters declared in a command-line execution.

[E. Victor Sanchez]

Separated this into two different feature enhancement requests depending on the invocation nature:

Function: #2831097
Model Transformation: #2831099