kea: fix conflict between kea-dhcp4 and kea-dhcp6 multilibs

kea: fix conflict between kea-dhcp4 and kea-dhcp6 multilibs

There are conflict of config files between kea and lib32-kea:
  | Error: Transaction test error:
  | file /etc/kea/kea-dhcp4.conf conflicts between attempted installs of lib32-kea-3.0.1-r0.core2_32 and kea-3.0.1-r0.x86_64_v3
  | file /etc/kea/kea-dhcp6.conf conflicts between attempted installs of lib32-kea-3.0.1-r0.core2_32 and kea-3.0.1-r0.x86_64_v3

Update this patch after kea was upgraded to 3.0.1.

Signed-off-by: Liu Yiding <liuyd.fnst@fujitsu.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>