Replace old Xena cycle signing key with Yoga
Replace old Xena cycle signing key with Yoga

This is a zuul-encrypted export of the signing subkey for the
Yoga release cycle: 0x01527a34f0d0080f8a5db8d6eb6c5df21b4b6363

This was created using the updated instructions from change
I7008706aae06b6e4a16db2dd85a8c7f91530cd50.

Change-Id: Ice1bdc121dfa8fd3e33b5f237848ae1417087ee4

openstack-infra/project-config,openstack-infra/project-config