* Support for hostport
- remove the hardcode cni conf file path
- move it to env variable
- keep it backward compatible even if env variable is not present
- support both .conf and .conflist
- daemonset with hostport support
Fixes: #168
* add unit test for InsertPodCidrInCniSpec for .conflist
* add documentation for hostport
If NODE_NAME env is not set, fall back to hostname.
Partial fix towards #23 we still have issue where kube-router is run as agent
and kubelet is started with --hostname-overide flag