Patch related to Timezone fix

[shmsr]

PR apache#7667: Remove non-UTC epoch logic
PR apache#8450: Making client time use UTC as the local time

It should fix the timezone related error.

Reason for this behaviour is that epoch difference was taken with the server's timezone rather than UTC always. But our epoch is UTC based only, so there was an unusual time offset.

For reference:

if is_epoch_in_utc:
                seconds_since_epoch = dttm.timestamp()
            else:
                seconds_since_epoch = (dttm - datetime(1970, 1, 1)).total_seconds()
            seconds_since_epoch = int(seconds_since_epoch)

CATEGORY

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• Bug Fix
• Enhancement (new features, refinement)
• Refactor
• Add tests
• Build / Development Environment
• Documentation

SUMMARY

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

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