Add dhcp-client as a dependency

BZ: 1964900
BREW: 38709341
Tested: By QA and reporter

cloud-init fails to deploy on Azure and AWS if dhcp-client is not installed. It should be set as a requirement for the installation.

X-downstream-only: true Resolves: rhbz#1964900

Signed-off-by: Eduardo Otubo otubo@redhat.com