Fixes: #12496
When an EBS volume was attached to an instance and the user tried to
resize, they would get an error as follows:
```
* aws_ebs_volume.ebs_data_volume: Error waiting for Volume (vol-027e83f7) to become available: unexpected state 'in-use', wanted target 'available'. last error: %!s(<nil>)
```
`available` is a state *only* when creating an EBS volume that is not attached. When an instance is attached, it will go into the state `in-use`. Therefore `in-use` is a valid state when modifying an EBS volume that is attached:
```
% make testacc TEST=./builtin/providers/aws TESTARGS='-run=TestAccAWSEBSVolume_' ✹ ✭
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/04/27 07:08:18 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v -run=TestAccAWSEBSVolume_ -timeout 120m
=== RUN TestAccAWSEBSVolume_importBasic
--- PASS: TestAccAWSEBSVolume_importBasic (41.10s)
=== RUN TestAccAWSEBSVolume_basic
--- PASS: TestAccAWSEBSVolume_basic (38.22s)
=== RUN TestAccAWSEBSVolume_updateAttachedEbsVolume
--- PASS: TestAccAWSEBSVolume_updateAttachedEbsVolume (199.11s)
=== RUN TestAccAWSEBSVolume_updateSize
--- PASS: TestAccAWSEBSVolume_updateSize (70.53s)
=== RUN TestAccAWSEBSVolume_updateType
--- PASS: TestAccAWSEBSVolume_updateType (69.75s)
=== RUN TestAccAWSEBSVolume_updateIops
--- PASS: TestAccAWSEBSVolume_updateIops (70.38s)
=== RUN TestAccAWSEBSVolume_kmsKey
--- PASS: TestAccAWSEBSVolume_kmsKey (76.64s)
=== RUN TestAccAWSEBSVolume_NoIops
--- PASS: TestAccAWSEBSVolume_NoIops (39.80s)
=== RUN TestAccAWSEBSVolume_withTags
--- PASS: TestAccAWSEBSVolume_withTags (38.04s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 643.609s
```
This allows for updates to size, type and iops
Fixes: #11931
```
% make testacc TEST=./builtin/providers/aws TESTARGS='-run=TestAccAWSEBSVolume_update'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/02/15 22:35:43 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v -run=TestAccAWSEBSVolume_update -timeout 120m
=== RUN TestAccAWSEBSVolume_updateSize
--- PASS: TestAccAWSEBSVolume_updateSize (53.57s)
=== RUN TestAccAWSEBSVolume_updateType
--- PASS: TestAccAWSEBSVolume_updateType (57.53s)
=== RUN TestAccAWSEBSVolume_updateIops
--- PASS: TestAccAWSEBSVolume_updateIops (53.63s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 164.753s
```
Paul Stack