AC-676: Create phpcs static check for ObsoleteConnectionTest

Author: eliseacornejo

Magento2/Tests/Legacy/ObsoleteConnectionUnitTest.php

@@ -23,14 +23,14 @@ public function getErrorList()
     public function getWarningList()
     {
         return [
-            3 => 1,
-            6 => 1,
+            7 => 1,
             10 => 1,
             14 => 1,
             18 => 1,
-            21 => 1,
+            22 => 1,
             25 => 1,
-            32 => 1
+            29 => 1,
+            36 => 1
         ];
     }
 }

Magento2/ruleset.xml

@@ -313,6 +313,10 @@
         <severity>8</severity>
         <type>warning</type>
     </rule>
+    <rule ref="Magento2.Legacy.ObsoleteConnection">
+        <severity>8</severity>
+        <type>warning</type>
+    </rule>
 
     <!-- Severity 7 warnings: General code issues. -->
     <rule ref="Generic.Arrays.DisallowLongArraySyntax">