Fix logger

Author: LukasWoodtli

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppBoostBeastClientCodegen.java

@@ -21,7 +21,7 @@
 
 public class CppBoostBeastClientCodegen extends AbstractCppCodegen {
 
-    static final Logger LOGGER = LoggerFactory.getLogger(CppBoostBeastClientCodegen.class);
+    private final Logger LOGGER = LoggerFactory.getLogger(CppBoostBeastClientCodegen.class);
 
     public CodegenType getTag() {
         return CodegenType.CLIENT;