[GOBBLIN-1885] Ensure All Logged Timestamps are in UTC

[umustafi]

Dear Gobblin maintainers,

Please accept this PR. I understand that it will not be reviewed until I have checked off all the steps below!

JIRA

• My PR addresses the following Gobblin JIRA issues and references them in the PR title. For example, "[GOBBLIN-XXX] My Gobblin PR"
  • https://issues.apache.org/jira/browse/GOBBLIN-1885

Description

• Here are some details about my PR, including screenshots (if applicable):
  Ensure all logs are in UTC for ease of comparison between other logging done.

Tests

• My PR adds the following unit tests OR does not need testing for this extremely good reason:

Commits

• My commits all reference JIRA issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

[codecov-commenter]

Codecov Report

Merging #3747 (84c006c) into master (e07450f) will decrease coverage by 0.14%.
Report is 2 commits behind head on master.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##             master    #3747      +/-   ##
============================================
- Coverage     47.14%   47.00%   -0.14%     
+ Complexity    10878    10851      -27     
============================================
  Files          2147     2147              
  Lines         84889    84898       +9     
  Branches       9418     9419       +1     
============================================
- Hits          40018    39906     -112     
- Misses        41246    41358     +112     
- Partials       3625     3634       +9     

Files Changed	Coverage Δ
...vice/modules/orchestration/FlowTriggerHandler.java	10.63% <0.00%> (ø)
.../modules/scheduler/GobblinServiceJobScheduler.java	70.08% <66.66%> (-4.65%)	⬇️

... and 21 files with indirect coverage changes

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[phet]

if public for more than just testability, it may belong in a utility class rather than here