Backports replicas change and rollover RTE cause handling

[dbbaughe]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #326 (26f0a57) into opendistro-1.9 (9d44bbb) will increase coverage by 0.81%.
The diff coverage is 33.33%.

@@                 Coverage Diff                  @@
##             opendistro-1.9     #326      +/-   ##
====================================================
+ Coverage             74.78%   75.59%   +0.81%     
- Complexity              700      714      +14     
====================================================
  Files                    92       92              
  Lines                  3918     3918              
  Branches                624      623       -1     
====================================================
+ Hits                   2930     2962      +32     
+ Misses                  670      638      -32     
  Partials                318      318              

Impacted Files	Coverage Δ	Complexity Δ
...atemanagement/step/rollover/AttemptRolloverStep.kt	55.65% <0.00%> (+0.95%)	14.00 <0.00> (ø)
...ndexstatemanagement/IndexStateManagementHistory.kt	77.88% <100.00%> (+2.15%)	28.00 <0.00> (+1.00)
...ndexstatemanagement/IndexStateManagementIndices.kt	62.06% <100.00%> (+0.66%)	10.00 <0.00> (ø)
...ticsearch/indexstatemanagement/model/Transition.kt	82.35% <0.00%> (-3.93%)	5.00% <0.00%> (ø%)
...dexstatemanagement/elasticapi/ElasticExtensions.kt	65.38% <0.00%> (+3.84%)	0.00% <0.00%> (ø%)
...h/refreshanalyzer/RefreshSearchAnalyzerResponse.kt	76.31% <0.00%> (+31.57%)	9.00% <0.00%> (+3.00%)
...shanalyzer/TransportRefreshSearchAnalyzerAction.kt	91.30% <0.00%> (+39.13%)	6.00% <0.00%> (+5.00%)
...refreshanalyzer/RestRefreshSearchAnalyzerAction.kt	91.66% <0.00%> (+49.99%)	7.00% <0.00%> (+4.00%)
...ch/refreshanalyzer/RefreshSearchAnalyzerRequest.kt	50.00% <0.00%> (+50.00%)	1.00% <0.00%> (+1.00%)

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