Fix read BarUniformlyDistributedLoad

[JosefTaylor]

The fake bar is because I can't access ReadBar from this namespace.

Issues addressed by this PR

Closes #186
Closes #187
Closes #172
Closes #173

Test files

https://burohappold.sharepoint.com/:f:/r/sites/BHoM/02_Current/12_Scripts/01_Test%20Scripts/ETABS_Toolkit/Etabs_Toolkit-Issue187-PullBarDistributedLoad?csf=1&e=NrMJUA

Changelog

• Corrected problem with bar uniform loads where loads would be read with nonsense parameters.
• Added an empty element to each load containing the ETABS_id so that loads can be correlated to existing elements.
• Added a note to let the user know the element is empty but contains the correct id.

Additional comments

[peterjamesnugent]

@JosefTaylor Add a warning message to explain the bar is fake and reference the Wiki for a more detailed explanation as discussed in weekly structures call.

[FraserGreenroyd]

@JosefTaylor can you nominate some reviewers for this please so this can be reviewed and closed out 😄 maybe @enarhi or @IsakNaslundBh ? Cheers!

[IsakNaslundBh]

I am happy to review this.

Will have a look at it next week.

[enarhi]

I can review early next week as well. Been a bit swamped this week.

[IsakNaslundBh]

This currently does not pull anything at all from one of my project models.

@JosefTaylor Do you have any testfiles I could try this on to rule out that there is not a problem with my specific model?

Also, think there are quite a lot of things in here that would need quite a big refactoring/general change. For example, this whole section should be moved into the adapter read, then it would not be a problem getting out the real bar. If you have time this might be worth doing now, as this would avoid the need for the fake bars.

Also, now the code tries to real all loads of all types, then filter afterwards. Think this should be refactored into separate methods instead. (again not really related to the changes you have made). Issue for this opened here #190

[enarhi]

Approved for functionality, refactoring per @IsakNaslundBh to follow as a separate issue.

[IsakNaslundBh]

Tested with testfile, now works for me as well!