Created an "addCategory" method for ParameterCategory setting (i.e. via

the REST API)

src/main/java/org/genesys2/server/service/TraitService.java

@@ -45,7 +45,16 @@ public interface TraitService {
 	Page<Method> listMethods(Pageable pageable);
 
 	/**
-	 * Add new crop descriptor
+	 * Add new crop descriptor Property Category
+	 * 
+	 * @param name
+	 * @return
+	 */
+	@PreAuthorize("isAuthenticated()")
+	ParameterCategory addCategory(String name);
+
+	/**
+	 * Add new crop descriptor Property
 	 * 
 	 * @param crop
 	 * @param title