Dev/john/9370 move to message bus event triggered merklelog sealing (…

…#131)

* Switch to message bus to gather tenants

The technique of polling the blob store is inefficient and hugely
expensive in Azure costs.

Listen to the confirmation messsage bus instead and watch for committed
events and confirm those tenants.

re AB#9370
re AB#9378

---------

Co-authored-by: John Hartley <[email protected]>
Co-authored-by: Henry Jewell <[email protected]>
Co-authored-by: jgough <[email protected]>
Co-authored-by: John Hartley <[email protected]>

mmrtesting/testcontext.go

@@ -41,7 +41,7 @@ func NewTestContext(t *testing.T, cfg TestConfig) TestContext {
 	}
 	logLevel := cfg.DebugLevel
 	if logLevel == "" {
-		logLevel = "INFO"
+		logLevel = "NOOP"
 	}
 	logger.New(logLevel)
 	c.Log = logger.Sugar.WithServiceName(cfg.TestLabelPrefix)
@@ -98,7 +98,12 @@ func (c *TestContext) DeleteBlobsByPrefix(blobPrefixPath string) {
 		for _, i := range r.Items {
 			blobs = append(blobs, *i.Name)
 		}
-		if len(r.Items) == 0 || r.Marker == nil {
+		if len(r.Items) == 0 {
+			break
+		}
+
+		// check for an empty marker as well as a nil marker
+		if r.Marker == nil || *r.Marker == "" {
 			break
 		}
 		marker = r.Marker