Fix OAuth1 database migration (#10233)

* Fix database migration for removing OAuth1 tables

* Add DB table prefix to migration

* Fix CS

Co-authored-by: Ruth Cheesley <ruth.cheesley@acquia.com>

app/migrations/Version20210609191822.php

@@ -17,14 +17,22 @@
 
 final class Version20210609191822 extends AbstractMauticMigration
 {
+    private $tables = [
+        'oauth1_access_tokens',
+        'oauth1_consumers',
+        'oauth1_nonces',
+        'oauth1_request_tokens',
+    ];
+
     /**
-     * Mautic 4 removed OAuth1 support, so we drop those tables.
+     * Mautic 4 removed OAuth1 support, so we drop those tables if they exist.
      */
     public function up(Schema $schema): void
     {
-        $schema->dropTable('oauth1_access_tokens');
-        $schema->dropTable('oauth1_consumers');
-        $schema->dropTable('oauth1_nonces');
-        $schema->dropTable('oauth1_request_tokens');
+        foreach ($this->tables as $table) {
+            if ($schema->hasTable($this->prefix.$table)) {
+                $schema->dropTable($this->prefix.$table);
+            }
+        }
     }
 }