🐛 create or update a document from an InputStream and optionally …

[tdumitriu]

…specify a filename

Fixes #672

Summary

Some users submit documents to the Discovery service through the provided SDK, but they do not want to use Files directly. (They may load the file into memory and simply pass the bytes as an InputStream.) In these cases, the name of the file is not available or automatically added as a parameter to the file section of the multi-part request. Because of this the ingestion fails since this process doesn't accept input streams without a file name.
With this commit we fix this issue (when only the InputStream is provided) by setting a generic filename. We also provide a mechanism for the user to be able to provide / specify the file name for these requests.

Other Information

Thanks for contributing to the Watson Developer Cloud!

[CLAassistant]

All committers have signed the CLA.

[codecov-io]

Codecov Report

Merging #630 into develop will decrease coverage by 12.83%.
The diff coverage is 80%.

@@              Coverage Diff               @@
##             develop     #630       +/-   ##
==============================================
- Coverage      60.11%   47.27%   -12.84%     
+ Complexity      1559     1131      -428     
==============================================
  Files            337      337               
  Lines           6908     6927       +19     
  Branches         429      430        +1     
==============================================
- Hits            4153     3275      -878     
- Misses          2433     3373      +940     
+ Partials         322      279       -43

Impacted Files	Coverage Δ	Complexity Δ
...watson/developer_cloud/discovery/v1/Discovery.java	89.89% <ø> (-0.06%)	29 <0> (ø)
...overy/v1/model/document/CreateDocumentRequest.java	84.9% <80%> (+12.17%)	7 <0> (ø)	⬇️
...veloper_cloud/text_to_speech/v1/model/Phoneme.java	0% <0%> (-100%)	0% <0%> (-3%)
...oper_cloud/alchemy/v1/model/LanguageSelection.java	0% <0%> (-100%)	0% <0%> (-1%)
...on/developer_cloud/alchemy/v1/AlchemyDataNews.java	0% <0%> (-91.67%)	0% <0%> (-5%)
...deoff_analytics/v1/model/column/NumericColumn.java	20% <0%> (-80%)	1% <0%> (-4%)
...atson/developer_cloud/dialog/v1/DialogService.java	0% <0%> (-76.24%)	0% <0%> (-23%)
...cloud/dialog/v1/model/ConversationDataOptions.java	0% <0%> (-75.76%)	0% <0%> (-6%)
...tson/developer_cloud/alchemy/v1/AlchemyVision.java	0% <0%> (-75.72%)	0% <0%> (-14%)
...eloper_cloud/alchemy/v1/util/AlchemyEndPoints.java	0% <0%> (-71.88%)	0% <0%> (-5%)
... and 144 more

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