GitLab

* Fix for wildcard domains handling in Route53

Wildcard domains (*.abc) are stored as "\\052.abc" in Route53,
which confuses external-dns as it tries to recreate entry over and
over.

It is confusing, but documented behaviour of Route53:
http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/DomainNameFormat.html?shortFooter=true#domain-name-format-asterisk

* Added tests for wildcard unescaping