Merge pull request #3266 from hashicorp/vault

Adding vault 0.8.0-rc1

library/vault

@@ -5,5 +5,5 @@
 0.7.0: git://github.com/hashicorp/docker-vault@02af9417ae42bf6290b4b36c2188b1836f1017a8 0.7.0
 0.7.2: git://github.com/hashicorp/docker-vault@02af9417ae42bf6290b4b36c2188b1836f1017a8 0.7.2
 0.7.3: git://github.com/hashicorp/docker-vault@02af9417ae42bf6290b4b36c2188b1836f1017a8 0.7.3
-0.8.0-beta1: git://github.com/hashicorp/docker-vault@20c626ab1c89a17c24f370ae18cfe6cbc0eb8d33 0.8.0-beta1
+0.8.0-rc1: git://github.com/hashicorp/docker-vault@638047d80dc87b97f7bda67c758f54b2826959ce 0.8.0-rc1
 latest: git://github.com/hashicorp/docker-vault@02af9417ae42bf6290b4b36c2188b1836f1017a8 0.7.3