Fix bug CCWMP-20941

Time zone files were not being loaded properly because the API for
ZoneInfoFile had changed, but the call to it from the glue code
hadn't. Now they are in sync and it works as it should.
Merge pull request #100 from enyojs/CCWMP-20941-2.5

Fix bug CCWMP-20941

Cherry-picking fix from master to 2.5-upkeep

Integrated-By: Gray Norton (gray.norton@lge.com)