Issue Retrieving configFile in scraper.go

[PumpkingWok]

Hi there,

• I found an issue when i try to retrieve configFile , initialized inside scraper.go

• scraper.go, Row 55:

  • configFile := os.Getenv("GOPATH") + "/go/src/github.com/diadata-org/api-golang/exchange-scrapers/config/exchange-scrapers.json"

• There are two issues:

  • 1. os.Getenv("GOPATH") can return empty string, from go 1.8.tested in Mac OS.
  • It should be fixed with build.Default.GOPATH
  • see it -> https://stackoverflow.com/questions/32649770/how-to-get-current-gopath-from-code#32650077
  • 2. The hardcoded string starts with "/go", it is duplicate because it is returned also from "GOPATH"

• I tested the code fixing these issues and it works.

[EDIT]

• I exported GOPATH and it works now , also with os.Getenv("GOPATH"). It remains only the second issue.
• For the first one maybe it could be useful to add a check to set default path in case of empty string returned, exactly how the stackoverflow example above.