Add fallback name if no configuration name is specified

[uhafner]

When a configuration instance does not define a name, then the metric should be used.

[github-actions]

☀️   Quality Monitor

   🚦   Tests: 100% successful (✔️ 168 passed)
   〰️   Line Coverage: 87% (165 missed lines)
   ➰   Branch Coverage: 84% (54 missed branches)
     CheckStyle: No warnings
     PMD: No warnings
     SpotBugs: No bugs
   🌀   Cyclomatic Complexity: 533 (total)
   💭   Cognitive Complexity: 199 (total)
   📏   Lines of Code: 4613 (total)
   📝   Non Commenting Source Statements: 1698 (total)
   🔭   Access to foreign data: 275 (total)
   🔗   Class cohesion: 100.00% (maximum)
   📤   Fan out: 551 (total)
   📲   Number of accessors: 53 (total)
   ⚖️   Weight of a class: 100.00% (maximum)
   📐   Weighted method count: 609 (total)
   ➿   N-Path Complexity: 903 (total)

---

Created by Quality Monitor v1.14.0 (#f3859fd). More details are shown in the GitHub Checks Result.