pmd change: allow increment/decrement in assignment

Author: aherbert

src/conf/pmd/pmd-ruleset.xml

@@ -234,6 +234,7 @@
 
   <rule ref="category/java/errorprone.xml/AssignmentInOperand">
     <properties>
+      <property name="allowIncrementDecrement" value="true" />
       <property name="violationSuppressXPath"
         value="./ancestor-or-self::ClassDeclaration[@SimpleName='Sorting'
                or @SimpleName='HashIndexSet'