chore: add additional logs in fetch cert chain

[aramase]

Signed-off-by: Anish Ramasekar anish.ramasekar@gmail.com

Reason for Change:

• Adds a warning log when the number of certs after reconstructing certificate chain is not equal to the number of certs from key vault.
  • This can be caused when the chain is incomplete

Requirements

• squashed commits
• included documentation
• added unit tests and e2e tests (if applicable).

Issue Fixed:

fixes #879

Does this change contain code from or inspired by another project?

• Yes
• No

If "Yes," did you notify that project's maintainers and provide attribution?

Special Notes for Reviewers:

[codecov-commenter]

Codecov Report

Merging #912 (c45dbbb) into master (1e5b425) will increase coverage by 0.12%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #912      +/-   ##
==========================================
+ Coverage   61.26%   61.39%   +0.12%     
==========================================
  Files           8        8              
  Lines         901      904       +3     
==========================================
+ Hits          552      555       +3     
  Misses        314      314              
  Partials       35       35