#1466 [core] Support sharing properties across mutliple rules

[Mark Anderson]

At the moment I need to specify duplciate violationSuppressXPath properties for multiple rules.

Ideally I would like to declare the properties once in a rule set then reference the properties from each rule where I would like to apply them (like path references in ant build.xml).

Otherwise another option would be to support properties being appled for all rules within a xml set.
e.g.

<rule ref="rulesets/java/codesize.xml">
    <properties>
      <property name="violationSuppressXPath" 
                value="//MethodDeclarator[@Image='equals'] | //MethodDeclarator[@Image='hashCode']"/>
    </properties>
  </rule>

instead of having to declare the properties for every rule within codesize.xml

[Andreas Dangel]

Replaced by https://github.com/pmd/pmd/issues/4331