MAGETWO-64523: Add static test on forbidden "final" keyword and eliminate it usage in code

 - included Magento specific PHPMD rules into static test suite

Author: Volodymyr Kublytskyi

dev/tests/static/framework/autoload.php

@@ -18,6 +18,7 @@
         $testsBaseDir . '/../integration/framework/Magento/TestFramework/',
     ]
 );
+$autoloadWrapper->addPsr4('Magento\\MessDetector\\', $testsBaseDir . '/framework/Magento/MessDetector/src');
 
 $generatedCode = DirectoryList::getDefaultConfig()[DirectoryList::GENERATED_CODE][DirectoryList::PATH];
 $autoloadWrapper->addPsr4('Magento\\', $baseDir . '/' . $generatedCode . '/Magento/');

dev/tests/static/testsuite/Magento/Test/Php/_files/phpmd/ruleset.xml

@@ -10,6 +10,7 @@
          xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
          xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
     <description>Magento Code Check Rules</description>
+    <php-includepath>../../../../../../framework</php-includepath>
 
     <!-- Code Size Rules -->
     <rule ref="rulesets/codesize.xml/CyclomaticComplexity" />
@@ -43,4 +44,8 @@
     <rule ref="rulesets/naming.xml/ShortMethodName" />
     <rule ref="rulesets/naming.xml/ConstantNamingConventions" />
     <rule ref="rulesets/naming.xml/BooleanGetMethodName" />
+
+    <!-- Magento Specific Rules -->
+    <rule ref="Magento/MessDetector/resources/rulesets/design.xml/FinalImplementation" />
+
 </ruleset>