Add some options for IEC installation scripts

Add some options for IEC installation scripts

1. Some options were added into the startup.sh script.
   "-k|--kube"    ---- The version of k8s
   "-c|--cni-ver" ---- Kubernetes-cni version
   "-C|--cni"     ---- CNI type: calico/flannel
2. In config file, those default values were also set.
3. Some log inforamtion about those parameters was add for
   varification when deploying the IEC infrastructure by
    startup.sh.

Change-Id: Ief59d31b7630dc3247305f869ea55137142b040c
Signed-off-by: Jingzhao.Ni <Jingzhao.Ni@arm.com>