Log generated prometheus config file in sidecar

Change-Id: Iafefe1d4fc91521ecc0da067c0d54bb6d26baa31
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/docker/Prometheus/src/app.py b/docker/Prometheus/src/app.py
index ff29151..eb62555 100755
--- a/docker/Prometheus/src/app.py
+++ b/docker/Prometheus/src/app.py
@@ -127,6 +127,7 @@
     print(f"Writing new config file to {prometheus_config_file}")
     config_file = open(prometheus_config_file, "w")
     config_file.truncate(0)
+    print(yaml.safe_dump(generated_prometheus_config))
     config_file.write(yaml.safe_dump(generated_prometheus_config))
     config_file.close()
     print("New config written, updating prometheus")