Be able to change the default name of the test class

At the moment, when we create an Arquillian from a class `MyClass`, the test is called `MyClassTest`. It would be good to have a `--named` parameter to be able to change the default name.

```
arquillian-create-test --value org.myapp.MyClass.java
arquillian-create-test --named MyCustomizedNameTest --value org.myapp.MyClass.java
```
