Add support for PreDestroy priority to control ordering

[rbygrave]

This allows control of the ordering of the PreDestroy methods. It does this using a int priority value. The default/baseline value is 1000. Setting values less than that means those methods run earlier and values over than means those methods run later.

e.g. using io.avaje.inject.PreDestroy priority attribute:

// Run before all the normal pre-destroy methods
@PreDestroy(priority = 100)
void close() {... }


// Run after all the normal pre-destroy methods
@PreDestroy(priority = 2000)
void close() {... }

e.g. using @Factory @Bean ... added the destroyPriority attribute.

@Factory
class MyFactory {

  @Bean(destroyMethod = "shutdown", destroyPriority = 1500)
  Hello data() {
    ...
  }
}

[SentryMan]

LGTM