S48-945: Add Plugin/Observer class complexity rule

- fine tuning thresholds

Author: stkec

rulesets/PhpMd/Magento/EntryPointClassComplexity.php

@@ -49,7 +49,7 @@ private function applyForMethod(AbstractNode $node, string $thresholdProperty, s
                     $node->getType(),
                     $node->getName(),
                     $ccn,
-                    $threshold,
+                    $threshold + 1,
                     $methodType
                 )
             );

rulesets/PhpMd/extra.xml

@@ -86,7 +86,7 @@ method entry. The decision points are 'if', 'while', 'for', and 'case labels'. G
         <priority>3</priority>
         <properties>
             <property name="reportLevel" description="The Cyclomatic Complexity reporting threshold for plugin and observer public methods"  value="6"/>
-            <property name="reportLevelPrivate" description="The Cyclomatic Complexity reporting threshold for private methods"  value="3"/>
+            <property name="reportLevelPrivate" description="The Cyclomatic Complexity reporting threshold for private methods"  value="4"/>
             <property name="showClassesComplexity"
                       description="Indicate if class average violation should be added to the report"
                       value="true"/>