Querying EC2 security groups should report unexpected errors
Querying EC2 security groups should report unexpected errors

As noted in #4277, we don't report any errors from the loop waiting for
a security group to exist. Instead, we should accept 'errors' which result
from the group not yet existing, and report errors which are actual issues
the user needs to resolve (eg, IAM permissions are incorrect).

Closes #4277

taliesins/packer,bryson/packer,routelastresort/packer,mafrosis/packer,mafrosis/packer,mitchellh/packer,routelastresort/packer,grubernaut/packer,tb3088/packer,tas50/packer,pvanbuijtene/packer,mkuzmin/packer,p1-nico/packer,atlassian/packer,p1-nico/packer,c22/packer,ChrisLundquist/packer,smaato/packer,c22/packer,pvanbuijtene/packer,taliesins/packer,timsutton/packer,grubernaut/packer,bryson/packer,ricardclau/packer,youhong316/packer,c22/packer,life360/packer,bryson/packer,tas50/packer,mkuzmin/packer,arizvisa/packer,rickard-von-essen/packer,tb3088/packer,grubernaut/packer,p1-nico/packer,mkuzmin/packer,tb3088/packer,routelastresort/packer,hashicorp/packer,ChrisLundquist/packer,sean-/packer,sneal/packer,rnaveiras/packer,pvandervelde/packer,tsmolka/packer,tas50/packer,life360/packer,markpeek/packer,mkuzmin/packer,mkuzmin/packer,jen20/packer,markpeek/packer,sneal/packer,dayglojesus/packer,tas50/packer,jimmythedog/packer,life360/packer,rickard-von-essen/packer,pieter-lazzaro/packer,markpeek/packer,arizvisa/packer,mafrosis/packer,p1-nico/packer,KohlsTechnology/packer,rnaveiras/packer,mitchellh/packer,boumenot/packer,paulmey/packer,zhuzhih2017/packer,pieter-lazzaro/packer,rickard-von-essen/packer,boumenot/packer,sneal/packer,youhong316/packer,taliesins/packer,sean-/packer,bryson/packer,ChrisLundquist/packer,life360/packer,youhong316/packer,rnaveiras/packer,KohlsTechnology/packer,jimmythedog/packer,pvanbuijtene/packer,quantang/packer,boumenot/packer,ChrisLundquist/packer,dave2/packer,pvandervelde/packer,quantang/packer,smaato/packer,bryson/packer,sneal/packer,jen20/packer,tsmolka/packer,paulmey/packer,jimmythedog/packer,taliesins/packer,mitchellh/packer,KohlsTechnology/packer,life360/packer,routelastresort/packer,markpeek/packer,tas50/packer,pecigonzalo/packer,dayglojesus/packer,sean-/packer,paulmey/packer,tb3088/packer,atlassian/packer,atlassian/packer,dayglojesus/packer,pecigonzalo/packer,arizvisa/packer,pvandervelde/packer,taliesins/packer,jen20/packer,youhong316/packer,taliesins/packer,arizvisa/packer,zhuzhih2017/packer,pvanbuijtene/packer,boumenot/packer,rickard-von-essen/packer,tsmolka/packer,grubernaut/packer,sean-/packer,pieter-lazzaro/packer,ChrisLundquist/packer,tas50/packer,pecigonzalo/packer,smaato/packer,smaato/packer,p1-nico/packer,jimmythedog/packer,ricardclau/packer,bryson/packer,pieter-lazzaro/packer,zhuzhih2017/packer,pvandervelde/packer,ricardclau/packer,tsmolka/packer,pvandervelde/packer,jen20/packer,smaato/packer,pieter-lazzaro/packer,ricardclau/packer,markpeek/packer,tb3088/packer,timsutton/packer,ChrisLundquist/packer,KohlsTechnology/packer,arizvisa/packer,dave2/packer,jen20/packer,rnaveiras/packer,youhong316/packer,pvanbuijtene/packer,mitchellh/packer,grubernaut/packer,zhuzhih2017/packer,mafrosis/packer,timsutton/packer,atlassian/packer,quantang/packer,atlassian/packer,c22/packer,timsutton/packer,ricardclau/packer,jen20/packer,grubernaut/packer,timsutton/packer,sneal/packer,rickard-von-essen/packer,pieter-lazzaro/packer,rnaveiras/packer,smaato/packer,hashicorp/packer,KohlsTechnology/packer,pvandervelde/packer,mkuzmin/packer,tsmolka/packer,jimmythedog/packer,rnaveiras/packer,timsutton/packer,paulmey/packer,ricardclau/packer,dave2/packer,tb3088/packer,pecigonzalo/packer,hashicorp/packer,paulmey/packer,dave2/packer,atlassian/packer,dave2/packer,quantang/packer,zhuzhih2017/packer,markpeek/packer,tsmolka/packer,sean-/packer,zhuzhih2017/packer,dayglojesus/packer,KohlsTechnology/packer,arizvisa/packer,boumenot/packer,dave2/packer,mafrosis/packer,p1-nico/packer,c22/packer,paulmey/packer,sean-/packer,c22/packer,mitchellh/packer,hashicorp/packer,dayglojesus/packer,youhong316/packer,quantang/packer,routelastresort/packer