Use node hostname in kube play when hostNetwork=true

When the hostNetwork option is set to true in the k8s yaml,
set the pod's hostname to the name of the machine/node as is
done in k8s. Also set the utsns to host.

Signed-off-by: Urvashi Mohnani <umohnani@redhat.com>

pkg/domain/entities/pods.go

@@ -146,6 +146,7 @@ type PodCreateOptions struct {
 	VolumesFrom        []string          `json:"volumes_from,omitempty"`
 	SecurityOpt        []string          `json:"security_opt,omitempty"`
 	Sysctl             []string          `json:"sysctl,omitempty"`
+	Uts                string            `json:"uts,omitempty"`
 }
 
 // PodLogsOptions describes the options to extract pod logs.
@@ -362,6 +363,12 @@ func ToPodSpecGen(s specgen.PodSpecGenerator, p *PodCreateOptions) (*specgen.Pod
 		return nil, err
 	}
 	s.Ipc = out
+
+	out, err = specgen.ParseNamespace(p.Uts)
+	if err != nil {
+		return nil, err
+	}
+	s.UtsNs = out
 	s.Hostname = p.Hostname
 	s.ExitPolicy = p.ExitPolicy
 	s.Labels = p.Labels