(SUP-2779) Fix the bug - telegraf postgres metrics unable to obtain data

Before this commit, the connection request from telegraf to PostgreSQL is not able to be authenticated due to SSL connection issue.
With this commit, now the authentication is successful and the Telegraf Postgre Metrics can get data to display.

Author: henrywangpuppet

manifests/profile/master/postgres.pp

@@ -34,7 +34,7 @@
     plugin_type => 'postgresql_extensible',
     options     => [{
       'interval'      => $query_interval,
-      'address'       => "postgres://telegraf@${postgres_host}:${port}/pe-puppetdb?sslmode=require&sslkey=/etc/telegraf/${trusted['certname']}_key.pem&sslcert=/etc/telegraf/${trusted['certname']}_cert.pem&sslrootcert=/etc/telegraf/ca.pem", #lint:ignore:140chars
+      'address'       => "postgres://telegraf@${postgres_host}:${port}/pe-puppetdb?sslmode=verify-full&sslkey=/etc/telegraf/${trusted['certname']}_key.pem&sslcert=/etc/telegraf/${trusted['certname']}_cert.pem&sslrootcert=/etc/telegraf/ca.pem", #lint:ignore:140chars
       'outputaddress' => $postgres_host,
       'databases'     => $databases,
       'query'         => [{