[Bug] Issue when a variable from a custom namespace has been used as an argument in the constructor.

The getExecutable() method from CtConstructorCall is returning "java.lang.Object()" when we use a variable from a custom namespace as an argument inside a constructor. The issue occurs even when the variable is initialized within the same class and used as an argument inside the constructor.

Input:
```
new com.ibm.ws.webservices.engine.description.ParameterDesc("Input",com.ibm.ws.webservices.engine.description.ParameterDesc.IN)
```
Actual:
```
java.lang.Object();
```
Expected:
```
com.ibm.ws.webservices.engine.description.ParameterDesc(java.lang.String,*argument type*)
```
Note:
We are using snipper pretty printer from spoon.

* OS: Windows 10
* JDK: 11
* Spoon version: 10.0.1