Add IT for cache tuning

[sruti1312]

Issue #:

Description of changes:
This PR will add IT for cache cluster RCA (field data cache and shard request cache).
TODO: Add IT for decision maker & auto tuning piece in another PR.

Tests:
n/a

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

[sidheart]

LGTM, Please don't merge this until someone fixes RcaControllerTest#nodeRoleChange and this PR gets a green checkmark

[codecov]

Codecov Report

Merging #382 into master will increase coverage by 0.23%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #382      +/-   ##
============================================
+ Coverage     69.73%   69.96%   +0.23%     
- Complexity     2236     2244       +8     
============================================
  Files           301      301              
  Lines         13436    13436              
  Branches       1115     1115              
============================================
+ Hits           9370     9401      +31     
+ Misses         3699     3676      -23     
+ Partials        367      359       -8     

Impacted Files	Coverage Δ	Complexity Δ
.../performanceanalyzer/rca/framework/api/Metric.java	76.19% <0.00%> (-4.77%)	8.00% <0.00%> (-1.00%)
...csearch/performanceanalyzer/rca/RcaController.java	83.00% <0.00%> (-0.98%)	46.00% <0.00%> (ø%)
...ceanalyzer/rca/framework/util/InstanceDetails.java	80.64% <0.00%> (ø)	15.00% <0.00%> (ø%)
...ceanalyzer/rca/store/rca/hotshard/HotShardRca.java	94.44% <0.00%> (+1.11%)	20.00% <0.00%> (+1.00%)
...search/performanceanalyzer/metrics/AllMetrics.java	91.95% <0.00%> (+2.06%)	0.00% <0.00%> (ø%)
...er/rca/store/rca/threadpool/QueueRejectionRca.java	96.05% <0.00%> (+2.63%)	14.00% <0.00%> (ø%)
...erformanceanalyzer/rca/scheduler/RCAScheduler.java	71.42% <0.00%> (+3.57%)	13.00% <0.00%> (+1.00%)
...zer/decisionmaker/deciders/CacheHealthDecider.java	91.30% <0.00%> (+4.34%)	22.00% <0.00%> (+2.00%)
...ecisionmaker/actions/ModifyCacheMaxSizeAction.java	82.35% <0.00%> (+7.84%)	21.00% <0.00%> (+3.00%)
.../rca/store/rca/util/NodeConfigCacheReaderUtil.java	65.00% <0.00%> (+15.00%)	5.00% <0.00%> (ø%)
... and 1 more

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