Allow user to configure extension to fail if token replacement is suspect

[wpschaub]

Would be especially useful if we can configure the Replace Tokens task to succeed with warnings or fail if a token cannot be found or replaced, so that a deployment can be failed if the required configuration is missing or suspect.

[colindembovsky]

@wpschaub Default behavior is "succeed with warnings". However, if you set warningsAsErrors to true, the task will fail if a token does not exist. Is this sufficient?

[wpschaub]

@colindembovsky that would be perfect, thank you!

[wpschaub]

@colindembovsky let me know when it is time to do some regression testing.

[colindembovsky]

@wpschaub what I meant was this behavior exists already - is there something else you need?

[wpschaub]

Sorry @colindembovsky, my bad. Have you documented this feature anywhere? I can find the variable in your code, but not in the documentation.