Spring Remove "The" in "The BeanFactory" title in Core AsciiDoc documentation

This title is cross-referenced in "1.1. Introduction to the Spring IoC Container and Beans". In this chapter, it would look cleaner if "The BeanFactory" was called "BeanFactory". Also, this title is the only one with the article "The" in the Core Technologies documentation.

Comment From: sbrannen

Hi @rossnico,

Thanks for submitting your first PR for the Spring Framework.

Also, this title is the only one with the article "The" in the Core Technologies documentation.

There are actually several sections whose title contains the article "The" (for example, numerous sections under Resources).

In light of that, I've taken a different approach in be782a219726cf3ad57bf810d03b3bb705f731d1 and am therefore closing this PR.