[external-dns-management]

Most notable changes

• [OPERATOR] On AWS the hosted zones potentially usable by a set of credentials
  are now filtered by the permissions for reading their record sets.
  So, even if the list permission is given for all zones, only zones
  whose record sets can really be read will be added to the available
  zone list. (b809fa6)

• [USER] #35 @MartinWeindel
  Source controller for DNS entries has been added to forward DNS entries to a target cluster.
  This allows to delegate management of the DNS backend to another cluster.

Improvements

• [OPERATOR] #35 @MartinWeindel
  New flags --target-creator-label-name, --target-creator-label-value, --target-owner-id, --target-set-ignore-owners to annotate/label multiple source clusters

• [OPERATOR] #33 @ialidzhikov
  Golang version is upgraded to 1.12.7.

• [OPERATOR] (cdd25bd)
  fixing duplicate dns entries by source controllers after restart

• [OPERATOR] (7121962)
  schedule recheck of DNS provider if error cause is external