Changes integ test java version from 14 to 11

[downsrob]

Signed-off-by: Robert Downs downsrob@amazon.com

Issue #, if available:
#200

Description of changes:
Changes the default Java version for CI in GitHub actions from 14 to 11.
CheckList:

• Commits are signed per the DCO using --signoff

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[codecov-commenter]

Codecov Report

Merging #284 (49ede6c) into main (ec01cdf) will decrease coverage by 0.08%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #284      +/-   ##
============================================
- Coverage     76.43%   76.35%   -0.09%     
- Complexity     2030     2048      +18     
============================================
  Files           262      262              
  Lines         11780    11848      +68     
  Branches       1870     1887      +17     
============================================
+ Hits           9004     9046      +42     
- Misses         1760     1776      +16     
- Partials       1016     1026      +10     

Impacted Files	Coverage Δ
...statemanagement/model/destination/CustomWebhook.kt	65.21% <0.00%> (-27.54%)	⬇️
...temanagement/opensearchapi/OpenSearchExtensions.kt	77.21% <0.00%> (-1.86%)	⬇️
...nt/indexstatemanagement/ManagedIndexCoordinator.kt	71.79% <0.00%> (-0.97%)	⬇️
...earch/indexmanagement/transform/TransformRunner.kt	86.42% <0.00%> (-0.72%)	⬇️
...transport/action/explain/TransportExplainAction.kt	66.49% <0.00%> (-0.70%)	⬇️
...agement/indexstatemanagement/ManagedIndexRunner.kt	55.38% <0.00%> (-0.32%)	⬇️
...earch/indexmanagement/transform/model/Transform.kt	85.21% <0.00%> (ø)
.../action/explain/TransportExplainTransformAction.kt	67.04% <0.00%> (ø)
.../indexmanagement/indexstatemanagement/step/Step.kt	95.23% <0.00%> (+0.23%)	⬆️
.../opensearch/indexmanagement/rollup/model/Rollup.kt	84.43% <0.00%> (+0.47%)	⬆️
... and 11 more

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[dbbaughe]

Is there a reason for going down? And any reason for not having both run in a matrix if both are supported?

[downsrob]

Is there a reason for going down? And any reason for not having both run in a matrix if both are supported?

@dbbaughe core java version is going to 11 so we are being asked to change CI to the same version. Core is going down as 14 is not a long term support java version. We were asked to include java 8, 11, 14, and 17 in a matrix (ref: #200)
I didn't do that because we have flaky test failures again. Say we made the multinode test run a matrix of 8, 11, 14, and 17. If we have a 15% chance of having a flaky failure on any given run, then we are failing at least one of the runs nearly 50% of the time (1 - .85^4 = .48), and when you retry, you can't retry just one version, you need to retry the full matrix.

Let me know if you think we still should though, or if you think we should do a matrix of just two versions. Java 17 is what we will be moving to next.