Fixing up the tests so they actually pass

Running the tests without these changes results in this error first:

```
--- FAIL: TestAccAWSNetworkAclsOnlyIngressRulesChange (24.92 seconds)
  testing.go:121: Step 0 error: Check failed: Invalid number of ingress
entries found; count = %!s(int=3)
FAIL
exit status 1
FAIL  github.com/hashicorp/terraform/builtin/providers/aws  24.974s
```

And after fixing that one you also get a few unexpected values due to
an expected order mismatch between the items in the set versus the
items in the config.

Those are also fixed, so the test is passing now.
Merge pull request #660 from svanharmelen/f-fix-aws-network-acl

Fixing up the tests so they actually pass