Refactor `CodeableConceptCdMapper` (#1136) #998

Job	Run time
Checkstyle	1m 28s
Spotbugs	1m 22s
Unit Tests	3m 14s
Integration Tests	9m 30s
End-to-End Testing	3m 44s
Build & Publish Docker Images (service, gp2gp, .)	1m 18s
Build & Publish Docker Images (wiremock, gp2gp-wiremock, .)	54s
Build & Publish Docker Images (mock-mhs-adaptor, gp2gp-mock-mhs, .)	1m 2s
Build & Publish Docker Images (gpcc-mock, gp2gp-gpcc-mock, ./docker/gpcc-mock)	28s
Build & Publish Docker Images (gpc-api-mock, gp2gp-gpc-api-mock, ./docker/gpc-api-mock)	35s
Build & Publish Docker Images (sds-api-mock, gp2gp-sds-api-mock, ./docker/sds-api-mock)	22s
	23m 57s

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