Rob Winch 6420cf28a9 Multiple <authentication-manager> Do Not Duplicate Alias
Previously, two authentication managers with different ids would duplicate
the alias to the global authentication manager. This would cause failures
for when allowBeanDefinitionOverriding = false.

This commit ensures that if the global authentication manager alias is
already set, then it is not set again. This means the first
<authentication-manager> will be used as the global AuthenticationManager.

Closes gh-8767
2022-05-03 14:52:22 -05:00
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