Updates for incorrect timezone setting

Summary:
We now make a timezone (utc) object from the timestamp given by 1P and then
use astimezone, to apply the parse/set timezone

Test Plan: None

Reviewers: danweaver

Differential Revision: http://sandbox-andylee-005.exosite.biz/D4
Updates for incorrect timezone setting

Summary:
We now make a timezone (utc) object from the timestamp given by 1P and then
use astimezone, to apply the parse/set timezone

Test Plan: None

Reviewers: danweaver

Reviewed By: danweaver

Differential Revision: http://codereview.exosite.com/D4
Merge pull request #8 from fiveohhh/tz_fix2

Timezone fix for systems that timezone can't be programmatically determined