Added a new function called get_actual_replica.

[njthykkathu]

Description:

Added a new function called get_actual_replica_level. It will get the actual number of replication level is set by the docker compose file. This can be used to compare if the replication level matches. Useful function for a healthcheck.

Testing instructions:

Can be tested using the test script, a new test function has also been added.

Types of changes

• [ ] Bug fix (non-breaking change that fixes an issue)
• [x ] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] The code follows the code style of this project.
• [ ] The changes require a documentation update.
• [ ] Documentation has been updated accordingly.
• [ ] Tests cover all changes in this PR.
• [ ] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Merging #72 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #72   +/-   ##
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  Coverage   85.08%   85.08%           
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  Files          62       62           
  Lines        2702     2702           
  Branches      224      224           
=======================================
  Hits         2299     2299           
  Misses        352      352           
  Partials       51       51

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