Display a more meaningful error message in case of misspelt module name.

[LogicException] Component 'VendorA_ModuleB' of type '' is not correctly registered.
instead of
[Magento\Framework\Exception\FileSystemException] The file "/composer.json" doesn't exist

Author: Jānis Elmeris

lib/internal/Magento/Framework/Module/Dir.php

@@ -45,6 +45,10 @@ public function getDir($moduleName, $type = '')
     {
         $path = $this->componentRegistrar->getPath(ComponentRegistrar::MODULE, $moduleName);
 
+        if (! isset($path)) {
+            throw new \LogicException("Component '$moduleName' of type '$type' is not correctly registered.");
+        }
+
         if ($type) {
             if (!in_array($type, [
                 self::MODULE_ETC_DIR,