Adds rollup mapper service

[dbbaughe]

Issue #, if available:

Description of changes:
Integ tests will be included with the runner PR

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 #339 (0215f9c) into master (469a646) will decrease coverage by 1.46%.
The diff coverage is 21.63%.

@@             Coverage Diff              @@
##             master     #339      +/-   ##
============================================
- Coverage     72.80%   71.33%   -1.47%     
- Complexity     1187     1195       +8     
============================================
  Files           181      181              
  Lines          6078     6249     +171     
  Branches        921      954      +33     
============================================
+ Hits           4425     4458      +33     
- Misses         1188     1316     +128     
- Partials        465      475      +10     

Impacted Files	Coverage Δ	Complexity Δ
...csearch/indexmanagement/rollup/util/RollupUtils.kt	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...sticsearch/indexmanagement/rollup/RollupIndexer.kt	8.47% <5.26%> (-91.53%)	1.00 <0.00> (ø)
...arch/indexmanagement/rollup/RollupMapperService.kt	30.63% <29.90%> (-19.37%)	9.00 <8.00> (+8.00)	⬇️
...icsearch/indexmanagement/IndexManagementIndices.kt	63.33% <100.00%> (-2.19%)	10.00 <0.00> (ø)
...nt/indexstatemanagement/model/destination/Slack.kt	40.90% <0.00%> (-13.64%)	2.00% <0.00%> (-2.00%)
...adata/TransportUpdateManagedIndexMetaDataAction.kt	85.18% <0.00%> (-3.71%)	9.00% <0.00%> (-1.00%)
...ch/indexmanagement/elasticapi/ElasticExtensions.kt	62.22% <0.00%> (-2.23%)	0.00% <0.00%> (ø%)
...agement/indexstatemanagement/ManagedIndexRunner.kt	55.04% <0.00%> (-0.62%)	41.00% <0.00%> (ø%)
...asticsearch/indexmanagement/rollup/model/Rollup.kt	82.47% <0.00%> (+1.03%)	43.00% <0.00%> (ø%)
... and 2 more

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[thalurur]

Optional - TODO: disable and not update job in target index if it clashes with other existing jobs, e.g. if the job1 is using fieldA as metric then job2 cannot use fieldA as dimension.