VOL-2154: Removed db/model from vendor folder

- Only kept reference to backend structure

Amendments:

- Adjusted imports to voltha-lib-go
- Adjusted vendor version for voltha-lib-go

Change-Id: I7e5ca9f2df7642d18e5a1835e20aa9062a8a3bd1
diff --git a/go.sum b/go.sum
index 08f8c27..1631883 100644
--- a/go.sum
+++ b/go.sum
@@ -190,8 +190,8 @@
 github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/onsi/gomega v1.5.0 h1:izbySO9zDPmjJ8rDjLvkA2zJHIo+HkYXHnf7eN7SSyo=
 github.com/onsi/gomega v1.5.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-github.com/opencord/voltha-lib-go/v2 v2.2.9 h1:lnBDQI7HqUucwaNS0A0jWXVpa+CiGVdYKe8k1YKHx9U=
-github.com/opencord/voltha-lib-go/v2 v2.2.9/go.mod h1:Hql0xWiBFqYM6WpE5G+w9//NdaIoR9mVzcvVYDxEnZY=
+github.com/opencord/voltha-lib-go/v2 v2.2.10 h1:BbTkuMnIhz1Uwb6oCQIpQFd0ppH12hqxO5ZZWR+eGog=
+github.com/opencord/voltha-lib-go/v2 v2.2.10/go.mod h1:Hql0xWiBFqYM6WpE5G+w9//NdaIoR9mVzcvVYDxEnZY=
 github.com/opencord/voltha-protos/v2 v2.0.1 h1:vcE0XxNVeu0SED0bW2lf2w24k/QMFrFqMexuedIyTEg=
 github.com/opencord/voltha-protos/v2 v2.0.1/go.mod h1:6kOcfYi1CadWowFxI2SH5wLfHrsRECZLZlD2MFK6WDI=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=