Removing guava dependency to fix jarhell (#709)

* removing guava to fix jarhell

Signed-off-by: Shenoy Pratik <[email protected]>

* update release notes

Signed-off-by: Shenoy Pratik <[email protected]>

---------

Signed-off-by: Shenoy Pratik <[email protected]>
(cherry picked from commit d7ff8cd)

Author: ps48

release-notes/opensearch-reporting.release-notes-2.8.0.0.md

@@ -5,6 +5,7 @@ Compatible with OpenSearch 2.8.0
 ### Bug Fixes
 * Update json version to 20230227 ([#692](https://github.com/opensearch-project/reporting/pull/692))
 * Update Gradle Wrapper to 7.6.1 ([#695](https://github.com/opensearch-project/reporting/pull/695))
+* Removing guava dependency to fix jarhell ([#709](https://github.com/opensearch-project/reporting/pull/709))
 
 ### Maintenance
 * Increment version to 2.8.0-SNAPSHOT ([#688](https://github.com/opensearch-project/reporting/pull/688))