Update config for JavadocMethodo

https://checkstyle.org/config_javadoc.html#JavadocMethod

Available properties here seem to have changed: `validateThrows` seems
to be the replacement for the two other throws-related properties that
were previously here.

Author: wfleming

config/codeclimate_checkstyle.xml

@@ -127,10 +127,9 @@
         <module name="JavadocMethod">
             <property name="scope" value="public"/>
             <property name="allowMissingParamTags" value="true"/>
-            <property name="allowMissingThrowsTags" value="true"/>
             <property name="allowMissingReturnTag" value="true"/>
             <property name="allowedAnnotations" value="Override, Test"/>
-            <property name="allowThrowsTagsForSubclasses" value="true"/>
+            <property name="validateThrows" value="false"/>
         </module>
         <module name="MethodName">
             <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9_]*$"/>