[Version] Bump 1.7.3 version for Guilin Maintenance Release

Issue-ID: TEST-283

Signed-off-by: mrichomme <morgan.richomme@orange.com>
Change-Id: I1f979b86c3d5b016b86a431f3278478907310142
diff --git a/values.yaml b/values.yaml
index bbc4a95..f812097 100644
--- a/values.yaml
+++ b/values.yaml
@@ -22,7 +22,7 @@
 
 # application image
 repository: nexus3.onap.org:10001
-image: onap/testsuite:1.7.2
+image: onap/testsuite:1.7.3
 pullPolicy: Always
 
 ubuntuInitImage: oomk8s/ubuntu-init:2.0.0