Fixes crash in #2431
Decided that `findResourceSecurityGroup` should return an error when
the SG is not found, since the callers cannot happily continue with a
`nil` SG
Also passes through a few error cases that were being swallowed.
/cc @catsby
Previously they would conflict you had multiple security group rules
with the same ingress or egress ports but different source security
groups because only the CIDR blocks were considered (which are empty
when using source security groups).
Updated to include migrations (from clint@ctshryock.com)
Signed-off-by: Clint Shryock <clint@ctshryock.com>
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.
Clint Shryock