VOL-1643 Update voltha-lib-go to use voltha-protos v3.0.0

and bump up the version to 3.0.0. voltha-protos is modified to be
compatible with the java language proto compilation. It's a major
change and a major version change has been made.

Change-Id: Ifb93430567ddf96aaa0fbf6e5853aad9e1070f6f
diff --git a/pkg/ponresourcemanager/ponresourcemanager.go b/pkg/ponresourcemanager/ponresourcemanager.go
index 0abe6c1..4587675 100755
--- a/pkg/ponresourcemanager/ponresourcemanager.go
+++ b/pkg/ponresourcemanager/ponresourcemanager.go
@@ -23,11 +23,11 @@
 	"fmt"
 	"strconv"
 
-	"github.com/boljen/go-bitmap"
-	"github.com/opencord/voltha-lib-go/v2/pkg/db"
-	"github.com/opencord/voltha-lib-go/v2/pkg/db/kvstore"
-	"github.com/opencord/voltha-lib-go/v2/pkg/log"
-	tp "github.com/opencord/voltha-lib-go/v2/pkg/techprofile"
+	bitmap "github.com/boljen/go-bitmap"
+	"github.com/opencord/voltha-lib-go/v3/pkg/db"
+	"github.com/opencord/voltha-lib-go/v3/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/v3/pkg/log"
+	tp "github.com/opencord/voltha-lib-go/v3/pkg/techprofile"
 )
 
 const (