Redis OOM errors

[sameersubudhi]

What was the problem?

This PR resolves #1919

How was it solved?

• Fix getLiveIndexingJobCount to include deletedBlocksIndexing job count (RC for OOM)
• Await when scheduling block deletion to be successfully added to the job queue
• Fix topics mapping for relayerFeeProcessed event
• Fix issues with client.js
• Fix edgecase scenario handling when setting IndexVerifiedHeight
• Decrease generatedBlocks count for the generator when handling deleted blocks

How was it tested?

Locally against testnet

[codecov]

Codecov Report

Merging #1927 (a86ece0) into release/0.7.0 (7879da7) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@              Coverage Diff               @@
##           release/0.7.0    #1927   +/-   ##
==============================================
  Coverage          67.01%   67.01%           
==============================================
  Files                298      298           
  Lines               5254     5254           
  Branches             954      954           
==============================================
  Hits                3521     3521           
  Misses              1733     1733           

[sameersubudhi]

Not merging the PR yet. There's still some unidentified issue remaining in the codebase.