Accept multiple input CSVs

[AlexAxthelm]

Expected behavior:

• When passing multiple source CSVs in, the config JSON string should include an array of filenames.
• when workflow.pacta recieves an array of input portfolio file names, the contents of those portfolios should be combined and aggregated into a single portfolio before further processing (PACTA treats all the contents as though they are a single portfolio)
• Only one logical portfolio is processed (regardless of how many input files it is made of)

AB#11685

[AlexAxthelm]

CC @cjyetman @jdhoffa for opinions

change in config json would god from:

{
 "portfolio_path": "input_dir/default_portfolio.csv",
}

to

{
 "portfolio_path": [
    "input_dir/default_portfolio.csv"
  ],
}

or

{
 "portfolio_path": [
    "input_dir/portfolio_1.csv",
    "input_dir/portfolio_2.csv",
    "input_dir/portfolio_3.csv"
  ],
}

[jdhoffa]

@AlexAxthelm I found this issue when reviewing some open discussions with Silicon Ally, is this still an important update?

If yes, I'll make sure to get it on the next sprint :-)