GCP rewrite ElascticClientHandlerTest (GONRG-844)

Description:

ElasticClientHandlerTest.java was fixed.

How to test:

mvn clean test

Changes include:

• Refactor (a non-breaking change that improves code maintainability).
• Bugfix (a non-breaking change that solves an issue).
• New feature (a non-breaking change that adds functionality).
• Breaking change (a change that is not backward-compatible and/or changes current functionality).

Changes in:

• GCP
• Azure
• AWS
• IBM

Dev Checklist:

• Added Unit Tests, wherever applicable.
• Updated the Readme, if applicable.
• Existing Tests pass
• Verified functionality locally
• Self Reviewed my code for formatting and complex business logic.

added GC label

changed the description

marked the checklist item Bugfix (a non-breaking change that solves an issue). as completed

marked the checklist item GCP as completed

marked the checklist item Added Unit Tests, wherever applicable. as completed

marked the checklist item Existing Tests pass as completed

marked the checklist item Verified functionality locally as completed

marked the checklist item Self Reviewed my code for formatting and complex business logic. as completed

@dkodeih @sumrazafar @danielscholl @kibattul Azure tests fail here on Indexer https://community.opengroup.org/osdu/platform/system/indexer-service/-/pipelines/17839

resolved all threads

approved this merge request

merged

mentioned in commit 32c90801

changed milestone to %M1 - Release 0.1