Platform Independent Maven Build: Add Maven Wrapper and Set Default Encoding

[jannickherrmann]

Description

Add a Maven wrapper to the project and set a default encoding in the pom.xml. The Maven wrapper ensures consistent use of the correct Maven version across different environments. Setting a default encoding ensures consistent character encoding.
Expected Behavior

• The project can be built using the Maven wrapper, eliminating the need for a pre-installed Maven.
• The default encoding is set to UTF-8, ensuring consistent handling of character encoding.

Actual Behavior

• Currently, the project requires a pre-installed version of Maven, which can lead to version inconsistencies among developers.
• The project does not explicitly set a default encoding, which can lead to inconsistencies in character encoding.

Environment

• Operating system:
• OpenShift versions:
• Project Versions:

Steps to reproduce

• Clone the project repository.
• Attempt to build the project without a pre-installed Maven.
• Observe the need for a specific Maven version.
• Check for character encoding inconsistencies due to the lack of a default encoding setting.