Fixes#7812
All of the options of `aws_db_security_group` ingress rules are
optional. Therefore, when one of them isn't set (and AWS doesn't
calculate the value), Terraform threw a panic
This commit just defensively codes around this fact. It checks to make
sure there is a value returned from the API before adding it to the map
```
% make testacc TEST=./builtin/providers/aws TESTARGS='-run=TestAccAWSDBSecurityGroup_'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
TF_ACC=1 go test ./builtin/providers/aws -v
-run=TestAccAWSDBSecurityGroup_ -timeout 120m
=== RUN TestAccAWSDBSecurityGroup_basic
--- PASS: TestAccAWSDBSecurityGroup_basic (38.66s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 38.682s
```
ARNs used to be build using the iamconn.GetUser func call. This wouldn't
work on some scenarios and was changed so that we can expose the
AccountId and Region via meta
This commit just changes the build ARN funcs to use this new way of
doing things
This test overrides the AWS_DEFAULT_REGION parameter as the security
groups are created in us-east-1 (due to classic VPC requirements)
```
% make testacc TEST=./builtin/providers/aws TESTARGS='-run=TestAccAWSDBSecurityGroup_importBasic'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
TF_ACC=1 go test ./builtin/providers/aws -v
-run=TestAccAWSDBSecurityGroup_importBasic -timeout 120m
=== RUN TestAccAWSDBSecurityGroup_importBasic
--- PASS: TestAccAWSDBSecurityGroup_importBasic (49.46s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 49.487s
```
It seems there are 4 locations left that use the `helper/multierror`
package, where the rest is TF settled on the `hashicorp/go-multierror`
package.
Functionally this doesn’t change anything, so I suggest to delete the
builtin version as it can only cause confusion (both packages have the
same name, but are still different types according to Go’s type system.
This landed in aws-sdk-go yesterday, breaking the AWS provider in many places:
3c259c9586
Here, with much sedding, grepping, and manual massaging, we attempt to
catch Terraform up to the new `awserr.Error` interface world.
Paul Stack