Make installing the guest agent configurable

I know this would probably go into an option struct, but I think that
should be another refactor. So for now just added a `bool`.

And while touching this file I also made it’s 100+ lines a little
shorter which makes reviewing on GH a lot nicer.

management/vmutils/deployment.go

@@ -10,7 +10,13 @@ import (
 // image source. "remoteImageSourceURL" can be any publically accessible URL to
 // a VHD file, including but not limited to a SAS Azure Storage blob url. "os"
 // needs to be either "Linux" or "Windows". "label" is optional.
-func ConfigureDeploymentFromRemoteImage(role *vm.Role, remoteImageSourceURL, os, newDiskName, destinationVhdStorageURL, label string) error {
+func ConfigureDeploymentFromRemoteImage(
+	role *vm.Role,
+	remoteImageSourceURL string,
+	os string,
+	newDiskName string,
+	destinationVhdStorageURL string,
+	label string) error {
 	if role == nil {
 		return fmt.Errorf(errParamNotSpecified, "role")
 	}
@@ -28,28 +34,36 @@ func ConfigureDeploymentFromRemoteImage(role *vm.Role, remoteImageSourceURL, os,
 // ConfigureDeploymentFromPlatformImage configures VM Role to deploy from a
 // platform image. See osimage package for methods to retrieve a list of the
 // available platform images. "label" is optional.
-func ConfigureDeploymentFromPlatformImage(role *vm.Role, imageName, destinationVhdStorageURL, label string) error {
+func ConfigureDeploymentFromPlatformImage(
+	role *vm.Role,
+	imageName string,
+	mediaLink string,
+	label string) error {
 	if role == nil {
 		return fmt.Errorf(errParamNotSpecified, "role")
 	}
 
 	role.OSVirtualHardDisk = &vm.OSVirtualHardDisk{
 		SourceImageName: imageName,
-		MediaLink:       destinationVhdStorageURL,
+		MediaLink:       mediaLink,
 	}
 	return nil
 }
 
 // ConfigureDeploymentFromVMImage configures VM Role to deploy from a previously
 // captured VM image.
-func ConfigureDeploymentFromVMImage(role *vm.Role, vmImageName, destinationContainerStorageURL string) error {
+func ConfigureDeploymentFromVMImage(
+	role *vm.Role,
+	vmImageName string,
+	mediaLocation string,
+	provisionGuestAgent bool) error {
 	if role == nil {
 		return fmt.Errorf(errParamNotSpecified, "role")
 	}
 
 	role.VMImageName = vmImageName
-	role.MediaLocation = destinationContainerStorageURL
-	role.ProvisionGuestAgent = false
+	role.MediaLocation = mediaLocation
+	role.ProvisionGuestAgent = provisionGuestAgent
 	return nil
 }