Add initial support for bucket lifecycle (#7563)

This PR is based off @sinhaashish's PR for object lifecycle
management, which includes support only for,
- Expiration of object
- Filter using object prefix (_not_ object tags)

N B the code for actual expiration of objects will be included in a
subsequent PR.

go.mod

@@ -60,6 +60,7 @@ require (
 	github.com/minio/highwayhash v1.0.0
 	github.com/minio/lsync v1.0.1
 	github.com/minio/mc v0.0.0-20190529152718-f4bb0b8850cb
+	github.com/minio/minio-go v0.0.0-20190327203652-5325257a208f
 	github.com/minio/minio-go/v6 v6.0.29
 	github.com/minio/parquet-go v0.0.0-20190318185229-9d767baf1679
 	github.com/minio/sha256-simd v0.1.0
@@ -93,9 +94,9 @@ require (
 	github.com/valyala/tcplisten v0.0.0-20161114210144-ceec8f93295a
 	go.etcd.io/bbolt v1.3.3 // indirect
 	go.uber.org/atomic v1.3.2
-	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
-	golang.org/x/net v0.0.0-20190628185345-da137c7871d7 // indirect
-	golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7
+	golang.org/x/crypto v0.0.0-20190621222207-cc06ce4a13d4
+	golang.org/x/net v0.0.0-20190620200207-3b0461eec859 // indirect
+	golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb
 	google.golang.org/api v0.4.0
 	gopkg.in/Shopify/sarama.v1 v1.20.0
 	gopkg.in/olivere/elastic.v5 v5.0.80