vendor: Bump hive to a050d77562a1ae37fc2358e047edef10623fc6f7

I updated the import path to keep up with
openshift/hive@ae569e39 (Add make verify target, 2018-09-24,
openshift/hive#13).  Then I bumped vendor/ with:

  $ rm -rf ~/.glide/cache/info/https-github.com-openshift-hive.json ~/.glide/cache/src/https-github.com-openshift-hive/
  $ glide remove github.com/openshift/hive
  $ glide get --strip-vendor github.com/openshift/hive
  $ glide-vc --use-lock-file --no-tests --only-code
  $ git checkout HEAD -- vendor/github.com/shurcooL/httpfs

using:

  $ glide --version
  glide version 0.13.2-dev
  $ (cd $GOPATH/src/github.com/Masterminds/glide && git describe)
  v0.13.1-7-g3e13fd1
  $ (cd $GOPATH/src/github.com/sgotti/glide-vc && git describe)
  v0.1.0-2-g6ddf6ee

I don't	know why I needed to clear my cache, but without that
line the remaining commands didn't bump
vendor/github.com/openshift/hive to its current master.

Bumping to openshift/hive@a050d775 (Merge pull request
openshift/hive#28 from wking/tag-20-load-balancers-per-request,
2018-09-28) gives us more reliable load-balancer deletion.

glide.yaml

@@ -28,12 +28,9 @@ import:
   version: ^1.15.39
 - package: github.com/libvirt/libvirt-go
   version: ^v4.7.0
-- package: github.com/openshift/hive
-  version: 296cb990171c6da62e134f3590c120bd16ef4d43
-  subpackages:
-  - contrib/pkg/aws_tag_deprovision
 - package: gopkg.in/AlecAivazis/survey.v1
   version: ^1.6.2
+- package: github.com/openshift/hive
 testImport:
 - package: github.com/stretchr/testify
   version: ^1.2.2

pkg/destroy/destroyer.go

@@ -7,7 +7,7 @@ import (
 	"os"
 	"path/filepath"
 
-	atd "github.com/openshift/hive/contrib/pkg/aws_tag_deprovision"
+	atd "github.com/openshift/hive/contrib/pkg/awstagdeprovision"
 	log "github.com/sirupsen/logrus"
 
 	"github.com/openshift/installer/pkg/asset/metadata"