[GOBBLIN-1821] Let flow execution ID propagate to the Job ID if it exists

[Will-Lo]

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-1821

Description

• Here are some details about my PR, including screenshots (if applicable):

Gobblin-as-a-Service assigns each flow a flow execution ID.
Gobblin cluster jobs generate a new ID for each job sent to it, this makes it difficult to associate them with the flow execution ID from GaaS.
Since currently GaaS only sends 1 concurrent job to Gobblin cluster, we want to ensure that we can propagate these IDs for easier ID tracking, so that clients can immediately determine the flow execution ID from the GTE of a flow

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"

[ZihanLi58]

public static String newJobId(String jobName, long executionId) ?

[ZihanLi58]

+1, LGTM

[codecov-commenter]

Codecov Report

Merging #3684 (1b09770) into master (9640ef0) will increase coverage by 0.55%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #3684      +/-   ##
============================================
+ Coverage     46.85%   47.40%   +0.55%     
+ Complexity    10754     8663    -2091     
============================================
  Files          2138     1727     -411     
  Lines         84021    66305   -17716     
  Branches       9337     7179    -2158     
============================================
- Hits          39365    31435    -7930     
+ Misses        41060    32131    -8929     
+ Partials       3596     2739     -857     

see 412 files with indirect coverage changes

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