Change resolve strategy DELEGATE_FIRST => OWNER_FIRST

[guillermocalvo]

Fixes #13250

Since the closure's resolve strategy was changed to DELEGATE_FIRST, thisObject.beanTypeResolver is no longer updated by the next assignment in SpringSecurityCoreGrailsPlugin:

beanTypeResolver = beanTypeResolverClass.newInstance(conf, grailsApplication)

Instead, the assignment is intercepted by BeanBuilder.setProperty and then discarded because currentBeanConfig is null:

public void setProperty(String name, Object value) {
  if (currentBeanConfig != null) {
    setPropertyOnBeanConfig(name, value);
  }
}

@puneetbehl I'm not sure what's the specific problem that we were trying to solve in #13150, so please let me know if you think using OWNER_FIRST here makes more sense than using DELEGATE_FIRST.