Remove guava from common module; Handle exceptions in sweeper

[apanicker-nflx]

Pull Request type

• Bugfix
• Refactoring (no functional changes, no api changes)

Changes in this PR

• Removed guava from common module
• Fixed exception handling within the sweeper

[aravindanr]

1. Wherever RetryTemplate is created, i suggest that they are created with a qualifier in a Spring @Configuration class. The RetryUtil encapsulated the guava retry boilerplate from the classes that need to use them. The createRetryTemplate() method brings the boilerplate back to the classes that use it.
2. I am not sure if we need blind retries over ES client calls, but that's a separate discussion.

[apanicker-nflx]

I am not sure if we need blind retries over ES client calls, but that's a separate discussion.

I removed the retries over single request ES client calls, and only added retries on the bulk request which can have partial failures.