test(xtext): make the case-sensitive exact pattern test discriminate

[joaodinissf]

Why the change

testCaseSensitiveExactPattern could not fail for a lookup that ignores case, because no candidate differs from "Other" only in case; adding "other" makes it discriminate.

Special things to note

• Follows up on fix(xtext): match case-sensitive pattern lookups against the candidate name #1551, which fixed case-sensitive pattern lookups.
• The other four tests in the class are unaffected: they look up foo*, FooBar, or a different type.

Change outline

 com.avaloq.tools.ddk.xtext.test/.../PatternAwareEObjectDescriptionLookUpTest.java
+  private static final String OTHER_LOWER_CASE = "other";
+  candidates: … description(OTHER), description(OTHER_LOWER_CASE)

🤖 Generated with Claude Code