Fix checkstyle rules for new release

- LineLength is no longer a child of tree walker
- Some of the JavadocMethod properties no longer exist
- Turn on alone_or_singleline for RightCurly

Author: jeffgbutler

checkstyle-override.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!--
 
-       Copyright 2016-2018 the original author or authors.
+       Copyright 2016-2020 the original author or authors.
 
        Licensed under the Apache License, Version 2.0 (the "License");
        you may not use this file except in compliance with the License.
@@ -44,6 +44,11 @@
             <property name="eachLine" value="true"/>
         </module>
 
+    <module name="LineLength">
+        <property name="max" value="120"/>
+        <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
+    </module>
+
     <module name="TreeWalker">
         <module name="OuterTypeFilename"/>
         <module name="IllegalTokenText">
@@ -56,10 +61,6 @@
             <property name="allowByTailComment" value="true"/>
             <property name="allowNonPrintableEscapes" value="true"/>
         </module>
-        <module name="LineLength">
-            <property name="max" value="120"/>
-            <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
-        </module>
         <module name="AvoidStarImport"/>
         <module name="OneTopLevelClass"/>
         <module name="NoLineWrap"/>
@@ -75,7 +76,7 @@
         </module>
         <module name="RightCurly">
             <property name="id" value="RightCurlyAlone"/>
-            <property name="option" value="alone"/>
+            <property name="option" value="alone_or_singleline"/>
             <property name="tokens" value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT, INSTANCE_INIT"/>
         </module>
         <module name="WhitespaceAround">
@@ -217,12 +218,8 @@
         <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="allowMissingJavadoc" value="true"/>
-            <property name="minLineCount" value="2"/>
             <property name="allowedAnnotations" value="Override, Test"/>
-            <property name="allowThrowsTagsForSubclasses" value="true"/>
         </module>
         <module name="MethodName">
             <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9_]*$"/>