Misleading Error message in RebinParamsValidator

[Keith Brown]

While i was testing #8849 i got confused by one of the error messages that was generated.

Before testing I'd never used rebin before so didn't know what it required in a string list. I put in an even number of values and it failed. I now know that it takes in an odd number of parameters, but the error message that was generated when I gave it two parameters confused me as at the time as I was giving it an even number of parameters:

"The number of bin boundaries must be even"

Consider making this error message more helpful or understandable

[Keith Brown]

Refs #9152 Error message less misleading

Even though before the error was okay, it wasn't clear to someone who didn't know about rebinning, nor was it always correct like in the case of "first boundary, width, last boundary, width, last boundary" as there are an odd number of boundary values.

The error now states that the number of parameters must be odd as this is what it checks for in the validator, and would mean that the correct number of boundaries is present.

Changeset: 235945d882b2ea60227b8a429181c84866e883a6

[Keith Brown]

To Tester:

Try re-binning, supplying an even number of parameters, the updated error should appear.

[Vickie Lynch]

Merge remote branch 'origin/feature/9152_RebinParamsValidator_Error_message'

Full changeset: ​c10d989e0e68822df1f97b2871c9c64960e5ccc8

[Stuart Campbell]

This ticket has been transferred to github issue ​9995