CLDSRV-720: Fix test hook metadata mongoclient

MongoClient setup returns a promise

Author: BourgoisMickael

tests/functional/aws-node-sdk/test/bucket/getBucketEncryption.js

@@ -25,7 +25,7 @@ describe('aws-sdk test get bucket encryption', () => {
     before(done => {
         const config = getConfig('default', { signatureVersion: 'v4' });
         s3 = new S3(config);
-        return metadata.setup(done);
+        metadata.setup(done);
     });
 
     beforeEach(done => s3.createBucket({ Bucket: bucketName }, done));