Add namespace resource

[petems]

• Only available in Enterprise

[petems]

Ran test with local instance of Vault Enterprise running:

$ ./vault server -dev
==> Vault server configuration:

             Api Address: http://127.0.0.1:8200
                     Cgo: disabled
         Cluster Address: https://127.0.0.1:8201
              Listener 1: tcp (addr: "127.0.0.1:8200", cluster address: "127.0.0.1:8201", max_request_duration: "1m30s", max_request_size: "33554432", tls: "disabled")
               Log Level: info
                   Mlock: supported: false, enabled: false
                 Storage: inmem
                 Version: Vault v1.0.3+prem
             Version Sha: 28a8a6dae0cea127d92e6f2a3cb0153132ab8c13

TF_ACC_ENTERPRISE=true make testacc
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test $(go list ./... |grep -v 'vendor') -v  -timeout 120m
=== RUN   TestNamespace_basic
--- PASS: TestNamespace_basic (0.07s)
PASS
ok  	github.com/terraform-providers/terraform-provider-vault/vault	24.849s

Creation in logs

2019-03-05T12:05:41.700Z [INFO]  core: successful mount: namespace=test-namespace-4991497302030061089/ path=sys/ type=ns_system
2019-03-05T12:05:41.700Z [INFO]  core: successful mount: namespace=test-namespace-4991497302030061089/ path=identity/ type=ns_identity
2019-03-05T12:05:41.700Z [INFO]  core: successful mount: namespace=test-namespace-4991497302030061089/ path=cubbyhole/ type=ns_cubbyhole
2019-03-05T12:05:41.701Z [INFO]  core: enabled credential backend: path=token/ type=ns_token
2019-03-05T12:05:41.726Z [INFO]  core: disabled credential backend: path=auth/token/
2019-03-05T12:05:41.727Z [INFO]  core: successfully unmounted: path=cubbyhole/ namespace=test-namespace-4991497302030061089/
2019-03-05T12:05:41.727Z [INFO]  core: successfully unmounted: path=identity/ namespace=test-namespace-4991497302030061089/
2019-03-05T12:05:41.728Z [INFO]  core: successfully unmounted: path=sys/ namespace=test-namespace-4991497302030061089/

[tyrannosaurus-becks]

Fantastic, @petems, thank you!