APPS-1338 Fix nil dereference on backup reading

[korotkov-aerospike]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 30.03%. Comparing base (44e936e) to head (eed3663).

Files with missing lines	Patch %	Lines
pkg/dto/base_dto.go	0.00%	4 Missing ⚠️
pkg/dto/backup_details.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               v2     #259      +/-   ##
==========================================
- Coverage   30.68%   30.03%   -0.65%     
==========================================
  Files          41       41              
  Lines        2327     2327              
==========================================
- Hits          714      699      -15     
- Misses       1519     1537      +18     
+ Partials       94       91       -3     

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[korotkov-aerospike]

I had updated lib version and added few more logs.
All tests on Jenkins passed.