fix: CacheAdapter does not connect when using a CacheAdapter with a JSON config (#8633)

spec/RedisCacheAdapter.spec.js

@@ -167,4 +167,18 @@ describe_only(() => {
       .then(() => expect(getQueueCount(cache)).toEqual(0))
       .then(done);
   });
+
+  it('should start and connect cache adapter', async () => {
+    const server = await reconfigureServer({
+      cacheAdapter: {
+        module: `${__dirname.replace('/spec', '')}/lib/Adapters/Cache/RedisCacheAdapter`,
+        options: {
+          url: 'redis://127.0.0.1:6379/1',
+        },
+      },
+    });
+    const symbol = Object.getOwnPropertySymbols(server.config.cacheController);
+    const client = server.config.cacheController[symbol[0]].client;
+    expect(client.isOpen).toBeTrue();
+  });
 });