VMware vSphere Integrated Containers provider (#206)

* Add Virtual Kubelet provider for VIC

Initial virtual kubelet provider for VMware VIC.  This provider currently
handles creating and starting of a pod VM via the VIC portlayer and persona
server.  Image store handling via the VIC persona server.  This provider
currently requires the feature/wolfpack branch of VIC.

* Added pod stop and delete.  Also added node capacity.

Added the ability to stop and delete pod VMs via VIC.  Also retrieve
node capacity information from the VCH.

* Cleanup and readme file

Some file clean up and added a Readme.md markdown file for the VIC
provider.

* Cleaned up errors, added function comments, moved operation code

1. Cleaned up error handling.  Set standard for creating errors.
2. Added method prototype comments for all interface functions.
3. Moved PodCreator, PodStarter, PodStopper, and PodDeleter to a new folder.

* Add mocking code and unit tests for podcache, podcreator, and podstarter

Used the unit test framework used in VIC to handle assertions in the provider's
unit test.  Mocking code generated using OSS project mockery, which is compatible
with the testify assertion framework.

* Vendored packages for the VIC provider

Requires feature/wolfpack branch of VIC and a few specific commit sha of
projects used within VIC.

* Implementation of POD Stopper and Deleter unit tests (#4)

* Updated files for initial PR

vendor/github.com/docker/libnetwork/ipams/remote/api/api.go

@@ -0,0 +1,90 @@
+// Package api defines the data structure to be used in the request/response
+// messages between libnetwork and the remote ipam plugin
+package api
+
+import "github.com/docker/libnetwork/ipamapi"
+
+// Response is the basic response structure used in all responses
+type Response struct {
+	Error string
+}
+
+// IsSuccess returns wheter the plugin response is successful
+func (r *Response) IsSuccess() bool {
+	return r.Error == ""
+}
+
+// GetError returns the error from the response, if any.
+func (r *Response) GetError() string {
+	return r.Error
+}
+
+// GetCapabilityResponse is the response of GetCapability request
+type GetCapabilityResponse struct {
+	Response
+	RequiresMACAddress bool
+}
+
+// ToCapability converts the capability response into the internal ipam driver capaility structure
+func (capRes GetCapabilityResponse) ToCapability() *ipamapi.Capability {
+	return &ipamapi.Capability{RequiresMACAddress: capRes.RequiresMACAddress}
+}
+
+// GetAddressSpacesResponse is the response to the ``get default address spaces`` request message
+type GetAddressSpacesResponse struct {
+	Response
+	LocalDefaultAddressSpace  string
+	GlobalDefaultAddressSpace string
+}
+
+// RequestPoolRequest represents the expected data in a ``request address pool`` request message
+type RequestPoolRequest struct {
+	AddressSpace string
+	Pool         string
+	SubPool      string
+	Options      map[string]string
+	V6           bool
+}
+
+// RequestPoolResponse represents the response message to a ``request address pool`` request
+type RequestPoolResponse struct {
+	Response
+	PoolID string
+	Pool   string // CIDR format
+	Data   map[string]string
+}
+
+// ReleasePoolRequest represents the expected data in a ``release address pool`` request message
+type ReleasePoolRequest struct {
+	PoolID string
+}
+
+// ReleasePoolResponse represents the response message to a ``release address pool`` request
+type ReleasePoolResponse struct {
+	Response
+}
+
+// RequestAddressRequest represents the expected data in a ``request address`` request message
+type RequestAddressRequest struct {
+	PoolID  string
+	Address string
+	Options map[string]string
+}
+
+// RequestAddressResponse represents the expected data in the response message to a ``request address`` request
+type RequestAddressResponse struct {
+	Response
+	Address string // in CIDR format
+	Data    map[string]string
+}
+
+// ReleaseAddressRequest represents the expected data in a ``release address`` request message
+type ReleaseAddressRequest struct {
+	PoolID  string
+	Address string
+}
+
+// ReleaseAddressResponse represents the response message to a ``release address`` request
+type ReleaseAddressResponse struct {
+	Response
+}