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/go.sum b/go.sum
index cee2dca..b1abe82 100644
--- a/go.sum
+++ b/go.sum
@@ -192,10 +192,11 @@
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/gomega v1.4.2 h1:3mYCb7aPxS/RU7TI1y4rkEn1oKmPRjNJLNEXgw7MH2I=
 github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-github.com/opencord/voltha-lib-go/v2 v2.2.18 h1:rie20b5QNhRjh9GL4THHdGiHSUqrx4VMEJw44hZI1Mk=
-github.com/opencord/voltha-lib-go/v2 v2.2.18/go.mod h1:vjd6PeC3vOYDE/ztMjraWFB2Wv1oaPcum1Xz4RJbSoE=
-github.com/opencord/voltha-protos/v2 v2.1.0 h1:Ppl4/3OBwgGuLk0ob9vIEwMGGRC2sqe7WWoxh0Uq/n0=
+github.com/opencord/voltha-lib-go/v2 v2.2.19 h1:t5feQyT+/EmE1nuS1uRIDKLITvaLIaBtX6NsMTfVxs8=
+github.com/opencord/voltha-lib-go/v2 v2.2.19/go.mod h1:CoY2amUEsbO2grCbJRk7G+Fl1Xb7vQLw3/uGLbTz0Ms=
 github.com/opencord/voltha-protos/v2 v2.1.0/go.mod h1:6kOcfYi1CadWowFxI2SH5wLfHrsRECZLZlD2MFK6WDI=
+github.com/opencord/voltha-protos/v2 v2.1.1 h1:Kyo3bL2bDtE5fyV/Ecci3d+Ui8LeXTVq9R3DD+IbKEQ=
+github.com/opencord/voltha-protos/v2 v2.1.1/go.mod h1:6kOcfYi1CadWowFxI2SH5wLfHrsRECZLZlD2MFK6WDI=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pascaldekloe/goe v0.1.0 h1:cBOtyMzM9HTpWjXfbbunk26uA6nG3a8n06Wieeh0MwY=
 github.com/pascaldekloe/goe v0.1.0/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=