Merge pull request #3037 from hashicorp/vault

Adding Vault 0.7.3

library/vault

@@ -4,4 +4,5 @@
 0.6.5: git://github.com/hashicorp/docker-vault@c087a27b5ec93445e89dc46f25af973f114f1399 0.6.5
 0.7.0: git://github.com/hashicorp/docker-vault@e0a91ac0bc931fca599d14c0593cc8e28c56a30d 0.7.0
 0.7.2: git://github.com/hashicorp/docker-vault@9a0b4b5039b66f4a9591b8be6ff79c15c112f882 0.7.2
-latest: git://github.com/hashicorp/docker-vault@9a0b4b5039b66f4a9591b8be6ff79c15c112f882 0.7.2
+0.7.3: git://github.com/hashicorp/docker-vault@8ae11b6202496a6a9d1e9a5fff99e8cbc5e31838 0.7.3
+latest: git://github.com/hashicorp/docker-vault@8ae11b6202496a6a9d1e9a5fff99e8cbc5e31838 0.7.3