Fix missing 'option tcp-check' for TCP health-check

Change-Id: I32ebbde30bf6995cfd56602064fb6a6bbf0c1ab5
diff --git a/haproxy/files/haproxy.cfg b/haproxy/files/haproxy.cfg
index 5926ace..f7c976d 100644
--- a/haproxy/files/haproxy.cfg
+++ b/haproxy/files/haproxy.cfg
@@ -172,6 +172,9 @@
   {%- if type == 'http' and 'httpchk' not in listen.get('options', []) %}
   option httpchk
   {%- endif %}
+  {%- if type == 'tcp' and 'tcp-check' not in listen.get('options', []) %}
+  option tcp-check
+  {%- endif %}
   {%- for option in checks.get('options', []) %}
   {{ type }}-check {{ option }}
   {%- endfor %}