Delete all objects in backup dir

Delete all objects in backup "dir" when deleting a backup, instead of
hard-coding individual file names/types. This way, we'll be able to
delete log files and anything else we add without having to update our
deletion code.

Signed-off-by: Andy Goldstein <andy.goldstein@gmail.com>

pkg/util/test/backup_service.go

@@ -19,6 +19,7 @@ package test
 
 import io "io"
 import mock "github.com/stretchr/testify/mock"
+import time "time"
 import v1 "github.com/heptio/ark/pkg/apis/ark/v1"
 
 // BackupService is an autogenerated mock type for the BackupService type
@@ -26,8 +27,29 @@ type BackupService struct {
 	mock.Mock
 }
 
-// DeleteBackup provides a mock function with given fields: bucket, backupName
-func (_m *BackupService) DeleteBackup(bucket string, backupName string) error {
+// CreateBackupLogSignedURL provides a mock function with given fields: bucket, backupName, ttl
+func (_m *BackupService) CreateBackupLogSignedURL(bucket string, backupName string, ttl time.Duration) (string, error) {
+	ret := _m.Called(bucket, backupName, ttl)
+
+	var r0 string
+	if rf, ok := ret.Get(0).(func(string, string, time.Duration) string); ok {
+		r0 = rf(bucket, backupName, ttl)
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string, string, time.Duration) error); ok {
+		r1 = rf(bucket, backupName, ttl)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// DeleteBackupDir provides a mock function with given fields: bucket, backupName
+func (_m *BackupService) DeleteBackupDir(bucket string, backupName string) error {
 	ret := _m.Called(bucket, backupName)
 
 	var r0 error
@@ -86,6 +108,29 @@ func (_m *BackupService) GetAllBackups(bucket string) ([]*v1.Backup, error) {
 	return r0, r1
 }
 
+// GetBackup provides a mock function with given fields: bucket, name
+func (_m *BackupService) GetBackup(bucket string, name string) (*v1.Backup, error) {
+	ret := _m.Called(bucket, name)
+
+	var r0 *v1.Backup
+	if rf, ok := ret.Get(0).(func(string, string) *v1.Backup); ok {
+		r0 = rf(bucket, name)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*v1.Backup)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string, string) error); ok {
+		r1 = rf(bucket, name)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // UploadBackup provides a mock function with given fields: bucket, name, metadata, backup, log
 func (_m *BackupService) UploadBackup(bucket string, name string, metadata io.ReadSeeker, backup io.ReadSeeker, log io.ReadSeeker) error {
 	ret := _m.Called(bucket, name, metadata, backup, log)