Merge branch 'clean-up' into 'master'

NOTICE

docs/tutorial/IndexerService.md

...pengroup/osdu/step_definitions/index/cleanup/RunTest.java

.../opengroup/osdu/step_definitions/index/cleanup/Steps.java

.../java/org/opengroup/osdu/common/CleanupIndiciesSteps.java

...c/main/resources/features/indexrecord/IndexRecord.feature

...exer-test-core/src/main/resources/testData/records_1.json

...r-test-core/src/main/resources/testData/records_1.mapping

...exer-test-core/src/main/resources/testData/records_2.json

...r-test-core/src/main/resources/testData/records_2.mapping

...exer-test-core/src/main/resources/testData/records_3.json

...r-test-core/src/main/resources/testData/records_3.mapping