ST6RI-630: Connections referring to redefined features are not properly rendered (PlantUML)

[himi]

Connections referring to redefined features could not be rendered correctly. Rather, the visualizer connected to the original feature rather than the redefined feature. This PR fixes this issue.

[himi]

By this fix,

package TestRedefinedFlow {
    action a0 {
        action a01 {
            out output;
        }
        flow f1 from a01.output to a02.input;
        action a02 {
            in input;
        }
    }

    action a1 :> a0 {
        action :>> a02;
    }

    action a2 :> a1 {
        action :>> a01 {
            out :>> output;
        }
    }

}

is rendered in interconnection view with SHOWINHERITED style as below