Fix for EPWToCSV

[Tom-Kingstone]

NOTE: Depends on

Issues addressed by this PR

Closes #140

Fixed EPWtoCSV trying to find a .hbjson file instead of a csv.
Also fixed returning a path when file conversion fails, as there would be no file or a corrupt file if it failed.

Test files

Try running EPWToCSV and see that the error does not occur any more.

Changelog

Additional comments

[Tom-Kingstone]

@BHoMBot check compliance
@BHoMBot check required

[bhombot-ci]

@Tom-Kingstone to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check branch-compliance
• check dataset-compliance
• check copyright-compliance
• check code-compliance
• check documentation-compliance
• check project-compliance
• check core
• check null-handling
• check serialisation
• check versioning
• check installer

[bhombot-ci]

The check code-compliance has already been run previously and recorded as a successful check. This check has not been run again at this time.

[bhombot-ci]

The check documentation-compliance has already been run previously and recorded as a successful check. This check has not been run again at this time.

[FraserGreenroyd]

Aligns with discussion, happy to approve

[FraserGreenroyd]

@BHoMBot this is a DevOps instruction. I am requesting neutral checks on: unit-tests

[bhombot-ci]

@FraserGreenroyd I have provided neutral checks to the checks requested. These checks will need to be run properly to obtain full results.

[Tom-Kingstone]

@BHoMBot check ready-to-merge

[bhombot-ci]

@Tom-Kingstone to confirm, the following actions are now queued:

• check ready-to-merge