Make spring-analyzer bean post processor distinguish 3 kinds of beans: @Component-like beans, @Bean-like beans, and XML-like beans

[IlyaMuravjov]

Description

Make it so 3 main kinds of beans are treated separately when it comes to determining their type:

• For @Component-like beans we can get the type by simply looking at the annotated class
• For @Bean-like beans we have to analyze the method defining bean (for now, we actually run it)
• For XML-like beans we can use beanClassName

This pull request is relevant because the approach used earlier failed for @Bean-like beans defined with a static method. It returned type of the @Configuration class defining the bean instead of type of the bean itself . For instance, in the following example for bean beanLogBeanFactoryPostProcessor we got WebConfiguration as its type instead of LogBeanFactoryPostProcessor.

@Configuration
public class WebConfiguration {
    @Bean
    public static LogBeanFactoryPostProcessor beanLogBeanFactoryPostProcessor() {
        return new LogBeanFactoryPostProcessor();
    }
}

How to test

Manual tests

Generate tests for Spring projects using all 3 kinds of beans.

Self-check list

• I've set the proper labels for my PR (at least, for category and component).
• PR title and description are clear and intelligible.
• I've added enough comments to my code, particularly in hard-to-understand areas.
• The functionality I've repaired, changed or added is covered with automated tests.
• Manual tests have been provided optionally.
• The documentation for the functionality I've been working on is up-to-date.