Nikolay Fedorovskikh 73f40afca9 Fix class references of its subclass issue
Motivation:

Realization of `AbstractTrafficShapingHandler.userDefinedWritabilityIndex()` has references to subclasses.
In addition, one of the subclasses overriding it, but the other does not.

Modifications:

Add overriding to the second subclass. Remove references to subclasses from parent class.

Result:

More consistent and clean code (OOP-stylish).
2017-02-27 07:49:06 +01:00
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