Search backend (Elasticsearch) Upgrade. Part 1 - Latest v7.17.x Upgrade.

Description:

ADR: #111

• As part of the Elasticsearch migration effort, the first part was done in MR, migration from Java high level rest API to Java API client SDK.
• Elasticsearch is still with version 7.
• The main goal is to get the service functioning properly with the new Java client.

How to test:

Does functionality was tested and how?

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:

• Common code
• Azure
• AWS
• IBM
• GC
• Community Implementation

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.

Other comments:

Any comments to approvers here