Use SDNC 1.7.4 version

Update SDNC helm charts to use version 1.7.4 (final El Alto release)

Change-Id: I257ac3b4a5780f612e2bcb84950231ed07a96876
Issue-ID: SDNC-939
Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
diff --git a/kubernetes/sdnc/values.yaml b/kubernetes/sdnc/values.yaml
index e0dc130..6ca69c6 100644
--- a/kubernetes/sdnc/values.yaml
+++ b/kubernetes/sdnc/values.yaml
@@ -32,7 +32,7 @@
 # application images
 repository: nexus3.onap.org:10001
 pullPolicy: Always
-image: onap/sdnc-image:1.7.3
+image: onap/sdnc-image:1.7.4
 
 
 # flag to enable debugging - application support required