Make k8sfv work for Felix 2.1.x
Make k8sfv work for Felix 2.1.x

- Get and use the API server's TLS certificate, instead of suppressing
  TLS certificate verification.  (Because Felix 2.1.x doesn't support
  K8S_INSECURE_SKIP_TLS_VERIFY.)

- Specify CALICO_DATASTORE_TYPE as well as FELIX_DATASTORETYPE.

Metaswitch/calico,neiljerram/felix,neiljerram/felix,neiljerram/felix,Metaswitch/calico,neiljerram/felix