Issue Summary

When Smart Attachments vendor was refactoring their app, they encountered an issue with workflow validators. They renamed class names for their validators and conditions and looks like Jira uses class names instead of the keys as when they did the update the validators failed to operate:

<workflow-validator key="category-is-not-empty-validator" i18n-name-key="attach.cat.workflow.validator.category-is-not-empty"
class="com.stiltsoft.jira.attachcategory.workflow.validators.CategoryNotEmptyImpl">
<description key="attach.cat.workflow.validator.category-not-empty.description"/>
<validator-class&gt;com.stiltsoft.jira.attachcategory.workflow.validators.CategoryNotEmpty</validator-class&gt;
<resource type="velocity" name="view" location="/vm/validators-conditions/category-not-empty-view.vm"/>
<resource type="velocity" name="input-parameters" location="/vm/validators-conditions/category-not-empty-edit.vm"/>
<resource type="velocity" name="edit-parameters" location="/vm/validators-conditions/category-not-empty-edit.vm"/>
</workflow-validator>

Steps to Reproduce

1. Clone https://bitbucket.org/Vinceal/rename-workflow-item/src
2. Start Jira 7.7.0
3. Create "Process Management" project
4. Install SmartAttachements 1.17.4
5. Activate SmartAttachments in project and add categories
6. Edit project workflow and add validator "Category Not Empty" on Create of an issue
7. Upgrade to SmartAttachements 1.18.0
8. Try to create an issue
   
   Recording: Jira validator class name.mp4

Expected Results

Class name is not used, the key is used instead

Actual Results

Class name is use, The key is ignored.

Workaround

Use the old class name