Fix copy_repo sending incorrect repo pairs when providing multiple pairs

[rajulkumar]

Copy_repo waits for the complete copy of non-rpm content before copying rpm content. However, there were some instances where previous repo pair was sent for non-rpm content copy when multiple repo pairs were provided.

Lambda functions seems to be the reason for the error as they resolve the values during execution rather than creation, hence might be picking incorrect values. This patch replaces it with a modified partial function method that resolves the values during creation instead of execution.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (4212bf1) to head (6fedeac).
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #333   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           54        54           
  Lines         3011      3014    +3     
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+ Hits          3011      3014    +3     

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[rohanpm]

Minor: I am not really fond of the name, because to me it implies a weaker kind of partial ("part partial"), while this is actually stronger than a usual partial object. It freezes all the arguments, while I think partial's name comes from the fact that it's typically used to partially freeze/bind a function's arguments.

Not a big deal obviously, given it's not public API.

Some other ideas for names: freeze_arguments, bind_arguments, full_partial.

[rajulkumar]

Thanks for the insight.
"Part partial" came from the fact that it's not providing all the features of a "partial", hence the name. However, suggested names sounds more meaningful.