[FAB-15267] Refactor PluginFactory mock in committer

Refactored PluginFactory mock in core/committer/txvalidator
/v14 to generate from local interface.

Change-Id: Id05b0d1abe9b7bb4787d7dbcf1b47893b92af779
Signed-off-by: Chongxin Luo <Chongxin.Luo@ibm.com>

Author: DereckLuo

core/committer/txvalidator/v14/mocks/plugin_factory.go

@@ -31,7 +31,13 @@ type Mapper interface {
 	vp.Mapper
 }
 
-//go:generate mockery -dir ../../../handlers/validation/api/ -name PluginFactory -case underscore -output mocks/
+//go:generate mockery -dir . -name PluginFactory -case underscore -output mocks/
+
+// PluginFactory local interface used to generate mock for foreign interface.
+type PluginFactory interface {
+	validation.PluginFactory
+}
+
 //go:generate mockery -dir ../../../handlers/validation/api/ -name Plugin -case underscore -output mocks/
 //go:generate mockery -dir . -name QueryExecutorCreator -case underscore -output mocks/