VOL-2172: Delete tech-profile on ONU
- Changes to supporting DELETE_TCONT_REQ and DELETE_GEM_PORT_REQ
- Bug fix to not delete tp instance for ONU-SingleInstance case
- Use voltha proto version 2.1.1
- Use voltha-lib-go version 2.2.19
- Bump voltha-openolt-adapter version to 2.2.4

Change-Id: I8caa4d13fec37227befddbe2444489b923169fbe
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 1bd48eb..92ac970 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -59,7 +59,7 @@
 github.com/mitchellh/go-homedir
 # github.com/mitchellh/mapstructure v1.1.2
 github.com/mitchellh/mapstructure
-# github.com/opencord/voltha-lib-go/v2 v2.2.18
+# github.com/opencord/voltha-lib-go/v2 v2.2.19
 github.com/opencord/voltha-lib-go/v2/pkg/adapters
 github.com/opencord/voltha-lib-go/v2/pkg/adapters/adapterif
 github.com/opencord/voltha-lib-go/v2/pkg/adapters/common
@@ -72,7 +72,7 @@
 github.com/opencord/voltha-lib-go/v2/pkg/techprofile
 github.com/opencord/voltha-lib-go/v2/pkg/db
 github.com/opencord/voltha-lib-go/v2/pkg/ponresourcemanager
-# github.com/opencord/voltha-protos/v2 v2.1.0
+# github.com/opencord/voltha-protos/v2 v2.1.1
 github.com/opencord/voltha-protos/v2/go/inter_container
 github.com/opencord/voltha-protos/v2/go/voltha
 github.com/opencord/voltha-protos/v2/go/common