Fix AnsibleTest workload key

In a previous patch, there was an effort to fix the empty
AnsibleTest workload key issue. However one more if condition is
needed to make it work, which will be added in this fix.

Author: kstrenkova

pkg/ansibletest/volumes.go

@@ -219,14 +219,16 @@ func GetVolumeMounts(
 		volumeMounts = append(volumeMounts, caCertVolumeMount)
 	}
 
-	workloadSSHKeyMount := corev1.VolumeMount{
-		Name:      "workload-ssh-secret",
-		MountPath: "/var/lib/ansible/test_keypair.key",
-		SubPath:   "ssh-privatekey",
-		ReadOnly:  true,
-	}
+	if instance.Spec.WorkloadSSHKeySecretName != "" {
+		workloadSSHKeyMount := corev1.VolumeMount{
+			Name:      "workload-ssh-secret",
+			MountPath: "/var/lib/ansible/test_keypair.key",
+			SubPath:   "ssh-privatekey",
+			ReadOnly:  true,
+		}
 
-	volumeMounts = append(volumeMounts, workloadSSHKeyMount)
+		volumeMounts = append(volumeMounts, workloadSSHKeyMount)
+	}
 
 	computeSSHKeyMount := corev1.VolumeMount{
 		Name:      "compute-ssh-secret",