Use the public IP for lb_fqdn in NFS test

The helm installation fails because the lb_fqdn is pointing to the
machine's hostname, which ends up in the kubeconfig that is used by helm
to initialize tiller. Given that this hostname is not resolvable from
the testing machine, the test fails.

Author: alexbrand

integration/nfsshare.go

@@ -12,8 +12,8 @@ func testNFSShare(aws infrastructureProvisioner, distro linuxDistro) {
 			Etcd:                []NodeDeets{node},
 			Master:              []NodeDeets{node},
 			Worker:              []NodeDeets{node},
-			MasterNodeFQDN:      node.Hostname,
-			MasterNodeShortName: node.Hostname,
+			MasterNodeFQDN:      node.PublicIP,
+			MasterNodeShortName: node.PublicIP,
 			SSHKeyFile:          sshKey,
 			SSHUser:             node.SSHUser,
 			NFSVolume: []NFSVolume{