opeanpi2beans enum values in capitals

[Wyvinar]

Story

As a Galasa developer, I want the enums produced by openapi2beans to conform to standard coding practice.

Background

Currently the enums that the generator produces have lower case values when they should be in a constant name format with their output value beside them. What we have currently:

public enum MyEnum {
    enumValue1,
    enumValue2;
}

What we should have:

public enum MyEnum {
    ENUM_VALUE_1 ("enumValue1"),
    ENUM_VALUE_2 ("enumValue2");
}

Tasks

• [x] create an enum value structure with 2 fields
• [x] when converting from schematypes to java enums fill in the 2 fields
• [x] change the enum moustache template to reflect the new structure