Use JDK 14 for CI and CD (#1226)

[vrozov]

opensearch-security pull request intake form

Please provide as much details as possible to get feedback/acceptance on your PR quickly

1. Category: (Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation)

2. Github Issue # or road-map entry, if available:

3. Description of changes:

4. Why these changes are required?

5. What is the old behavior before changes and new behavior after changes? (Please add any example/logs/screen-shot if available)

6. Testing done: (Please provide details of testing done: Unit testing, integration testing and manual testing)

7. TO-DOs, if any: (Please describe pending items and provide Github issues# for each of them)

8. Is it backport from main branch? (If yes, please add backport PR # and commits #)

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or

(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or

(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.

(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (opendistro-1.8@6836972). Click here to learn what that means.
The diff coverage is n/a.

@@                Coverage Diff                @@
##             opendistro-1.8    #1231   +/-   ##
=================================================
  Coverage                  ?   63.32%           
  Complexity                ?     3052           
=================================================
  Files                     ?      234           
  Lines                     ?    16677           
  Branches                  ?     3004           
=================================================
  Hits                      ?    10561           
  Misses                    ?     4567           
  Partials                  ?     1549           

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