Support of ranges of integer literal values in enumerated

Submitted by fiannetti @fiannetti

Link to original bug (#514317)

Description

According to the latest TTCN-3 standard "Each enumerated value may optionally have a user-assigned integer value or non-empty list of integer literal values or ranges of integer literal values..."

Where "ranges of integer literal values" means the declaration of "Other" field: type enumerated MyThirdEnumType { Blue(0),
Yellow(1),
Green(3),
Other(4..255) }

See http://www.etsi.org/deliver/etsi_es/201800_201899/20187301/04.08.01_60/es_20187301v040801p.pdf, Clause 6.2.4, Example 3.

This kind of notation would be useful to simplify ITS security data type definitions.

Version: 6.1.0