Key methods for Resource types

resource.go

@@ -0,0 +1,13 @@
+package fission
+
+func (f Function) Key() string {
+	return f.Metadata.Name
+}
+
+func (e Environment) Key() string {
+	return e.Metadata.Name
+}
+
+func (ht HTTPTrigger) Key() string {
+	return ht.Metadata.Name
+}