Suppress only specific database exception

Allow all other exceptions to fall throw.
Fixes #364
Does not conflict with #304

src/Model/DbAutodiscoveryModel.php

@@ -35,6 +35,9 @@ public function fetchColumns($module, $version, $adapter_name)
         try {
             $metadata = new Metadata($adapter);
         } catch (\Exception $e) {
+            if (strpos($e->getMessage(), 'Unknown adapter platform') === false) {
+                throw $e;
+            }
             return [];
         }