Project secrets into knative CRD

This commit projects secrets into the Knative CRD YAML, however
it appears that the CRD validator for the Service object will
now allow multiple volumes to be mounted into the same directory
which breaks compatiability with OpenFaaS on Kubernetes.

A separate directory is used for each secret with the key so
that "aws" will be mounted at /var/openfaas/secrets/aws/name.

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

schema/knative/v1alpha1/serving.go

@@ -25,11 +25,28 @@ type ServingSpecRunLatestConfigurationRevisionTemplate struct {
 
 type ServingSpecRunLatestConfigurationRevisionTemplateSpec struct {
 	Container ServingSpecRunLatestConfigurationRevisionTemplateSpecContainer `yaml:"container"`
+	Volumes   []Volume                                                       `yaml:"volumes,omitempty"`
 }
 
 type ServingSpecRunLatestConfigurationRevisionTemplateSpecContainer struct {
-	Image string    `yaml:"image"`
-	Env   []EnvPair `yaml:"env,omitempty"`
+	Image        string        `yaml:"image"`
+	Env          []EnvPair     `yaml:"env,omitempty"`
+	VolumeMounts []VolumeMount `yaml:"volumeMounts,omitempty"`
+}
+
+type VolumeMount struct {
+	Name      string `yaml:"name"`
+	MountPath string `yaml:"mountPath"`
+	ReadOnly  bool   `yaml:"readOnly"`
+}
+
+type Volume struct {
+	Name   string `yaml:"name"`
+	Secret Secret `yaml:"secret"`
+}
+
+type Secret struct {
+	SecretName string `yaml:"secretName"`
 }
 
 type EnvPair struct {