session: Move implementation of class AbstractRequest#request to companion object
session: Move implementation of class AbstractRequest#request to companion object

Signed-off-by: Sami Rosendahl <b33c757bb777642ab0d59c699f8d5782929a814f@reaktor.fi>
Signed-off-by: Timo Mali <93a63fc11b7fc4c8615b3718bbdb07aef12d7334@reaktor.fi>

akisaarinen/ccf,akisaarinen/ccf