Add csit case for NSD management Subscriptions

Issue-ID: INT-1015
Signed-off-by: Olivia.Zhan <zhan.jie1@zte.com.cn>
Change-Id: I33a8503461234d7811e6a4b0156e4d2c90321f0a
diff --git a/plans/vfc-nfvo-catalog/sanity-check/testplan.txt b/plans/vfc-nfvo-catalog/sanity-check/testplan.txt
index 10c4036..290908d 100644
--- a/plans/vfc-nfvo-catalog/sanity-check/testplan.txt
+++ b/plans/vfc-nfvo-catalog/sanity-check/testplan.txt
@@ -12,3 +12,4 @@
 vfc/nfvo-catalog/NSDescriptors.robot
 vfc/nfvo-catalog/IndividualNSDescriptor.robot
 vfc/nfvo-catalog/NSDContent.robot
+vfc/nfvo-catalog/NSDMSubscriptions.robot