Fix use of deprecated Maven properties

[charphi]

Fix the following warnings in Maven when using configuration specified in codegen documentation:

The expression ${groupId} is deprecated. Please use ${project.groupId} instead.
The expression ${artifactId} is deprecated. Please use ${project.artifactId} instead.
It is highly recommended to fix these problems because they threaten the stability of your build.
For this reason, future Maven versions might no longer support building such malformed projects.

[codecov]

Codecov Report

Merging #1314 (f8e14c7) into master (84013e3) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1314   +/-   ##
=========================================
  Coverage     93.78%   93.78%           
  Complexity      469      469           
=========================================
  Files             2        2           
  Lines          6951     6951           
  Branches       1864     1864           
=========================================
  Hits           6519     6519           
  Misses          146      146           
  Partials        286      286           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 84013e3...f8e14c7. Read the comment docs.

[remkop]

Merged. Thank you for the contribution!
I will update the release notes when I get to my PC.

[remkop]

Release notes updated.