make suse and sles support 127.0.1.1

[chengcheng-chcheng]

Same as ubuntu-debian as link below, make sles-suse also support 127.0.1.1
http://www.leonardoborda.com/blog/127-0-1-1-ubuntu-debian/

Tested on the local sles, changed the local hosts.suse.tmpl and opensuse.py files and then changed the hostname or set the static ip, the 127.0.1.1 was set in the /etc/hosts

[blackboxsw]

Thanks for the PR submittal @chengcheng-chcheng
Cloud-init is governed by a contributor license agreement.

Would you be able to submit the CLA so we can merge this commit of yours into cloud-init upstream?

Details are below.
https://cloudinit.readthedocs.io/en/latest/topics/hacking.html#do-these-things-once

[blackboxsw]

Looks good, but we'll need a CLA signed in order to accept this patch upstream please.

[chengcheng-chcheng]

Looks good, but we'll need a CLA signed in order to accept this patch upstream please.

For the Transferring CLA Signatures , post review here:
#356

[rjschwei]

LGTM

[blackboxsw]

Thanks for this PR @chengcheng-chcheng and for signing the CLA for cloud-init to contribute this. Again the branch looks good and I can confirm that that localhost IP change is valid on local opensuse containers I launch. I've asked for a look from a OpenSUSE mantainer to make sure.