terraform run
Fixes#3550
The simple fix here was to check if the Resource was new (to set the
value the first time) then check it has changed each time
I was able to see from the TF log the following:
```
Config
resource "aws_vpc" "foo" {
cidr_block = "10.10.0.0/16"
}
resource "aws_subnet" "foo" {
cidr_block = "10.10.1.0/24"
vpc_id = "${aws_vpc.foo.id}"
}
resource "aws_instance" "foo" {
ami = "ami-4fccb37f"
instance_type = "m1.small"
subnet_id = "${aws_subnet.foo.id}"
source_dest_check = false
disable_api_termination = true
}
```
No longer caused any Modifying source_dest_check entries in the LOG
338aab9169