Add a mojo to write prefixed properties into a file

[benjamin-cartereau]

I would be great to be able to write project properties for keys with specific or common prefix to a file, and removing this prefix.
It is in some way the opposite of the ReadPropertiesMojo dealing with a prefix.
This way, it could be used in association with "keyPrefix" attribute of ReadPropertiesMojo, to isolate properties for specific environment for example.
Having a common prefix would prevent to duplicate a value that would be the same for all the environments.