by fixing the logic of enum Boolean checking.
Other changes:
* Remove the `true &&` prefix from the `equals` method in models.
* Apply some changes of Java-default to Java-okhttp-gson, i.e. adding
`this` and parent model handling.
* Some improvements on spaces and blank lines.
This change adds `this` to field names in `equals` within `pojo.mustache` so that an incorrect `equals` method is not generated in cases where a class has an internal field that is the same as the `classVarName` of the class.
A swagger file that contains a definition named "object" compiles into a
class named Object. This is technically not a problem as it lives in a
different package than java.lang.Object, but this requires the templates to
refer to Java's Object using its fully qualified name.
