The dnsutils and jessie-dnsutils images are installing dnsmasq,
which is required for a few tests checking custom DNS servers and
configurations.
dnsmasq is a Linux specific binary. In order for the tests to also
pass on Windows, this commit adds CoreDNS to the images, so a later
commit will update the tests to use CoreDNS instead of dnsmasq.
- Remove debian-security for a couple of arch(es) as they are not
available in the debian repos
- Also fix up the unbound SED problem with push() method
Change-Id: Ibb14ead9581954b66b39c02bcefb5adaa2464fab
We can then avoid the following warning:
```
WARNING: The '--' argument must be specified between gcloud specific args on the left and DOCKER_ARGS on the right. IMPORTANT: previously, commands allowed the omission of the --, and unparsed arguments were treated as implementation args. This usage is being deprecated and will be removed in March 2017.
This will be strictly enforced in March 2017. Use 'gcloud beta docker' to see new behavior.
```
Signed-off-by: Jess Frazelle <acidburn@google.com>