Fix issuerRef in NBI and NG-UI certificates to use ca-issuer as an Issuer

Change-Id: I33fd6ac833518f3ba2ada5d9aa0264c59c29553c
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/helm/osm/templates/nbi/nbi-certificate.yaml b/installers/helm/osm/templates/nbi/nbi-certificate.yaml
index afb5da5..ad42e93 100644
--- a/installers/helm/osm/templates/nbi/nbi-certificate.yaml
+++ b/installers/helm/osm/templates/nbi/nbi-certificate.yaml
@@ -39,7 +39,7 @@
     - "client auth"
   issuerRef:
     name: ca-issuer
-    kind: ClusterIssuer
+    kind: Issuer
     group: cert-manager.io
 {{- end }}
 {{- end }}
diff --git a/installers/helm/osm/templates/ng_ui/ngui-certificate.yaml b/installers/helm/osm/templates/ng_ui/ngui-certificate.yaml
index 8e03fbf..ccc19ee 100644
--- a/installers/helm/osm/templates/ng_ui/ngui-certificate.yaml
+++ b/installers/helm/osm/templates/ng_ui/ngui-certificate.yaml
@@ -39,7 +39,7 @@
     - "client auth"
   issuerRef:
     name: ca-issuer
-    kind: ClusterIssuer
+    kind: Issuer
     group: cert-manager.io
 {{- end }}
 {{- end }}