Issue 857: add maven settings.xml and update liberty version

[uberskigeek]

Checklist:

• [x ] Read the Code of Conduct and Contributing Guidelines.

• [ x] Followed the commit message guidelines.

• [x ] Stack adheres to Appsody stack structure.

Modifying an existing stack:

• [x ] Updated the stack version in stack.yaml

Contributing a new stack:

• Describe how application dependencies are managed:

• Explain how Appsody file watcher is utilized:

• Describe other Appsody environment variables defined by the stack image:

• Describe any limitations and known issues:

Related Issues:

Fixes #857