Reduce node retry interval

This reduces the retry interval from 60 -> 15 seconds.
This change reduces the potential wasted time of a Node finishing
configuration immediately after a retry.

Author: sebsoto

test/e2e/wmco_test.go

@@ -15,7 +15,7 @@ import (
 
 var (
 	nodeCreationTime  = time.Minute * 35
-	nodeRetryInterval = time.Minute * 1
+	nodeRetryInterval = time.Second * 15
 	// deploymentRetries is the amount of time to retry creating a Windows Server deployment, to compensate for the
 	// time it takes to download the Server image to the node
 	deploymentRetries = 10