[VOL-4442] grpc streaming connection monitoring

Change-Id: I435a03fdc0ac2b549dc4512220148cb19c16db19
diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/probe/probe.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/probe/probe.go
index 84a2d5f..7ba1a57 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/probe/probe.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/probe/probe.go
@@ -275,6 +275,8 @@
 }
 
 func (p *Probe) IsReady() bool {
+	p.mutex.RLock()
+	defer p.mutex.RUnlock()
 	return p.isReady
 }