rename provider and provisioner packages

Using plural names to avoid collisions in existing code.

provider/doc.go

@@ -1,3 +0,0 @@
-// Package provider contains the interface and primary types required to
-// implement a Terraform resource provider.
-package provider

providers/doc.go

@@ -0,0 +1,3 @@
+// Package providers contains the interface and primary types required to
+// implement a Terraform resource provider.
+package providers

providers/provider.go

@@ -1,4 +1,4 @@
-package provider
+package providers
 
 import (
 	"github.com/hashicorp/terraform/config/configschema"

provisioners/provisioner.go

@@ -53,9 +53,9 @@ type ProvisionResourceRequest struct {
 	// Config is the complete provisioner configuration.
 	Config cty.Value
 
-	// Connection is a map of string values containing any information required
+	// Connection contains any information required to access the resource
-	// to access the resource instance.
+	// instance.
-	Connection map[string]string
+	Connection cty.Value
 
 	// UIOutput is used to return output during the Apply operation.
 	UIOutput UIOutput