Fix: Replace deprecated delimitedList with DelimitedList

[coderamaster]

Description

Fixed deprecation warning in test utilities by replacing delimitedList with DelimitedList.

Problem

The test utilities use delimitedList from pyparsing, which is deprecated in newer versions. This causes deprecation warnings when running tests:

pyparsing.warnings.PyparsingDeprecationWarning: 'delimitedList' deprecated - use 'DelimitedList'

Solution

• Updated import in tests/unitutil/cxml.py to use DelimitedList instead of delimitedList.
• Replaced two usages of delimitedList() with DelimitedList() in the grammar function.

Changes Made

• Updated import statement (line 18).
• Replaced delimitedList(attr_def) with DelimitedList(attr_def) (line 246).
• Replaced delimitedList(node) with DelimitedList(node) (line 263).

Testing

• Code changes verified.
• No syntax errors.
• Functionality preserved (DelimitedList is the direct replacement).

Checklist

• Code follows project style guidelines.
• Changes are minimal and focused.
• No breaking changes.
• PR description is clear.