Java: regenerate tests after fixing enum generation

[Mingun]

This PR updates Java tests to ensure that unknown enum values will be accessible. More info in the compiler PR.

Related issues:

• Compiler changes: Java: generate enums as interface + enum + class for unknown values kaitai_struct_compiler#288
• Runtime changes: Implement runtime support for non-exhaustive enums in Java kaitai_struct_java_runtime#42
• Tracking issue: Consistently handle parsed enum values that are not listed in the enum kaitai_struct#778

[Mingun]

Tests updated to reflect latest changes in the compiler