Fix/syncing old blocks 1385

[Torresmorah]

Use the first inserted block to check when synchronization should stop.

What does this PR do?

• Resolve The synchronization of old blocks ends before completion #1385
• Persist the first inserted block to
  • Make the comparision with the next block instead of check if it is already in the DB
  • The first block could be deleted by the service to remove old blocks
• Limit the query to get the last block in the DB
• Use an array of promises to synchronize old blocks

Steps to test

1. Run the project locally with EVM configuration
2. Check the service to synchronize old blocks

[xavier506]

LGTM