Re-committing changes after fetching and rebasing.
Addressing issues/concerns in #11611
Add option to run SSH tests.

Refs saltstack/salt-testing#16 and #12661
Support for continuous integration testing of salt-ssh
Cleanup
Only listen on localhost.
Remove trailing white-space.
Add coding header
Remove extra new line
Add missing ECDSA, ED25519 ssh key file types.
Drop duplicated versions in salt.modules.pkg_resource.sort_pkglist()
Merge pull request #12678 from eliasp/pkg_resource-deduplicate-pkg-versions

Drop duplicated versions in salt.modules.pkg_resource.sort_pkglist()
Add clarification for pull #12678
Merge pull request #12667 from s0undt3ch/hotfix/ssh-tests

Ssh tests
Merge pull request #12676 from garethgreenaway/ssh_host_key_fixes

Add missing ECDSA, ED25519 ssh key file types.
Merge pull request #12677 from gtmanfred/nova

Fix up some cloud stuff
Merge pull request #12526 from markizano/hotfix.11611

Addressing issues/concerns in #11611
add missing parenthesis
Merge pull request #12688 from gtmanfred/develop

add missing parenthesis