simplify unique _ports test
simplify unique _ports test


Former-commit-id: e62b5fd6be085c26f5a3030ddc9951fe2ce3370e
MSLNZ/msl-loadlib,MSLNZ/msl-loadlib,MSLNZ/msl-loadlib,MSLNZ/msl-loadlib,MSLNZ/msl-loadlib