config: add some omitempty tags

These are rarely set, but will start getting exercised more with future
changes.

Signed-off-by: Hank Donnay <[email protected]>

Author: hdonnay

config/matchers.go

@@ -20,5 +20,5 @@ type Matchers struct {
 	// "suse"
 	// "ubuntu"
 	// "crda" - remotematcher calls hosted api via RPC.
-	Names []string `yaml:"names" json:"names"`
+	Names []string `yaml:"names,omitempty" json:"names,omitempty"`
 }

config/updaters.go

@@ -7,7 +7,7 @@ type Updaters struct {
 	// TODO(louis): this is only used in clairctl, should we keep this?
 	// it may offer an escape hatch for a particular updater name
 	// from running, vs disabling the updater set completely.
-	Filter string `yaml:"filter" json:"filter"`
+	Filter string `yaml:"filter,omitempty" json:"filter,omitempty"`
 	// Config holds configuration blocks for UpdaterFactories and Updaters,
 	// keyed by name.
 	//