- Rename list_globalnetworkpolicies() to get_globalnetworkpolicies() for consistency
- Fix constructor parameter type from str to List[str] to match SSH output
- Add Optional[str] type annotation for age attribute
- Update get_age() return type to Optional[str]
- Update docstrings to align with types
Change-Id: Ied62a53d5d33a06bca1af4318b3c4c0082a0a604
Signed-off-by: Andrew Vaillancourt <andrew.vaillancourt@windriver.com>