Enhance managing db2 info for bind package

[dennis-behm]

Today, zAppBuild allows to perform a db2 bind package as part of a userBuild scenario, using the BindUtilities.
This utility is also providing a cli interface to use it outside of the zAppBuild process.

The following needs to be enhanced:

• Append the bind log to the log for the buildfile (containing compile + link steps).
• Enable the utility to use file property overrides if multiple configurations are managed in the same context.
• Document the overall bind functionality.