Record errors for beaneditform and form using only the field name instead of 
injecting a field (patch incl)
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                 Key: TAP5-831
                 URL: https://issues.apache.org/jira/browse/TAP5-831
             Project: Tapestry 5
          Issue Type: New Feature
          Components: tapestry-core
    Affects Versions: 5.2
            Reporter: Sebastian Hennebrueder


In order to record an error for a field using custom validation, currently you 
have to use t:parameter to define a custom input field inside of beaneditform
and inject that field into your page class.

The provided patch adds a method
recordError(String fieldname, String errorMessage) to beaneditform, form and 
validation tracker to allow using just the fieldname or id.

A test is included and I build a sample application using this approach. I 
didn't want to extend the existing test apps as it was unclear to me where to 
my code.

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