vendor: Update all the unpinned things

Generated with:

  $ rm -rf "$(go env GOPATH)/pkg/dep/sources"
  # to avoid errors like "Unable to update checked out version: fatal: reference is not a tree"
  # possibly [1]
  $ dep ensure -update

using:

  $ dep version
  dep:
   version     : v0.5.0
   build date  :
   git hash    : 22125cf
   go version  : go1.10.3
   go compiler : gc
   platform    : linux/amd64
   features    : ImportDuringSolve=false

I haven't reviewed all of these changes, but I want this to pull in
openshift/hive@b1cad987 (contrib/pkg/awstagdeprovision: Allow for OR
filters, 2018-10-18, openshift/hive#47).

[1]: golang/dep#928 (comment)