Add Support for Relevant Classes

[nmaguirre]

So far, Stryker has no support for relevant classes. As a consequence, the only relevant class to be considered for the repair is the class containing the method to repair.

Add support for relevant classes. Relevant classes are represented as a string, e.g.,

"examples.bintree.base.BinTree,examples.bintree.base.Node"

This issue involves the following tasks:

• add an attribute to BasicProgramRepairer to hold the relevant classes. By default, relevantClasses only hold the class containing the method to fix.
• add constructors to BasicProgramRepairer that enable the creation of instances by passing, besides other necessary parameters, the relevant classes. DO NOT REMOVE existing constructors; provide new ones.
• add an attribute to StrykerRepairSearchProblem to hold the relevant classes. By default, relevantClasses only hold the class containing the method to fix.
• add constructors to StrykerRepairSearchProblem that enable the creation of instances by passing, besides other necessary parameters, the relevant classes. DO NOT REMOVE existing constructors; provide new ones.
• update method success in class StrykerRepairSearchProblem to pass relevant classes when calling TACO, when relevant classes are provided.
• add command line options to RepairerCLI, to optionally provide relevant classes when calling Stryker from the command line.
• add/update appropriate javadoc comments to modified/introduced routines and attributes.
• add tests to verify that your modifications work as expected.