Minor changes on Section 9.3.5 Application Service

Move this section up to become 9.3.4

For better readability:

from "An application service represents an explicitly defined exposed application behavior." to "An application service represents an explicitly defined behavior that an application internal structure element exposes to its environment."
from "An application service exposes the functionality of components to their environment." to "An application service exposes the functionality of application internal active structure elements to their environment.
from "This functionality is accessed through one or more application interfaces and is realized by one or more application functions that are performed by the component." to "This functionality is accessed through one or more application interfaces and is realized by one or more application internal behavior elements that are performed by the internal active structure elements."
from "may require, use, and produce data objects." to "It may require, use, and produce application passive structure elements."
from "An application service may serve business, application, and technology behavior or active structure elements." to "An application service may serve business, application, and technology behavior or internal active structure elements."
from "An application function or process may realize an application service." to "An application internal behavior element may realize an application service."
from "An application service may access data objects." to "An application service may access application passive structure elements."