Prints fully qualified class name when the simple names of arguments match.

Made changes to Equals.toStringWithType by reusing same method to achieve both cases by sending a boolean as an input, based on which either simple name or fully qualified name will be used for describing the type.

Also in the method ArgumentMatchingTool.getNotMatchingArgsWithSameName return Set<String> which return the simple names of classes having more than one classes with different FQCN.

In Equals have passed qualified class name instead of the boolean.
Also removed getWantedClass and instead made getWanted public and used it.
Have also added 3 test cases for cases where some arguments have same simple class name.

Fixed the style issues, by running gradlew :spotlessApply

Also needed to handle the case where argument is null, which gave null pointer while getting class name from the object.