[Task: misc] misc EDV workflow code cleaning

[JanghyunJK]

• refactoring directory
• change paths in scripts accordingly
• testing
• review scripts that are used often
• reviewing test scripts. having comprehensive suite of unit tests
• delete unused scripts
• gem updates
  • if gems in gemfile are all used with the latest master/develop branch, will the synthetic-data-creation workflow fail?
  • if yes, what needs to be fixed?
• found this chunk under if statement is doing nothing.
  • need to fix?
  • is it included in the BSync schema?
• etc.

[JanghyunJK]

moved contents to here