Rename configuration property for consistency

src/main/java/de/thm/arsnova/controller/ConfigurationController.java

@@ -72,7 +72,7 @@ public class ConfigurationController extends AbstractController {
 	@Value("${features.question-format.grid-square.enabled:false}")
 	private String gridSquareEnabled;
 
-	@Value("${question.answerOptionLimit:8}")
+	@Value("${question.answer-option-limit:8}")
 	private String answerOptionLimit;
 
 	@Value("${question.parse-answer-option-formatting:false}")

src/main/webapp/arsnova.properties.example

@@ -168,7 +168,7 @@ feedback.cleanup=10
 upload.filesize_b=1048576
 
 # maximal number of answer options allowed for a skill question
-question.answerOptionLimit=8
+question.answer-option-limit=8
 
 # Enable Markdown and MathJax parsing in answer options. Formatting in answer
 # options should be used cautiously since it could lead to display errors.

src/test/resources/arsnova.properties.example

@@ -168,7 +168,7 @@ feedback.cleanup=10
 upload.filesize_b=1048576
 
 # maximal number of answer options allowed for a skill question
-question.answerOptionLimit=8
+question.answer-option-limit=8
 
 # Enable Markdown and MathJax parsing in answer options. Formatting in answer
 # options should be used cautiously since it could lead to display errors.