Add task to read remote pub key
Add task to read remote pub key

Lookups occur on the local machine, not on the remote.
This is reasone why we need to read first key

Depends-On: https://review.opendev.org/#/c/657541/
Change-Id: I80074cad76d989c3a6c2fa1615b621c08503855f
Closes-Bug: 1824326

openstack/tripleo-common,openstack/tripleo-common