Feat: Shorten Verbose Class Names

[Johannes-Schneider]

Context

Many of the public class names are extremely verbose and, thus, very long.
For example:

• SapServiceOperatorLayeredServiceBindingAccessor
• SapServiceOperatorServiceBindingIoAccessor
• SapVcapServicesServiceBindingAccessor

Request

Please shorten these names to increase readability.

Suggestions

• Consider removing the Sap prefix
• Consider replacing the ServiceBindingAccessor suffix with just Accessor (in the end: The entire library is just about Service Bindings, so repeating that over and over again might not make too much sense)