bk_server.conf & website are missing doc for tlsCertificatePath #2699
Description
BUG REPORT
Describe the bug
The default bk_server.conf file that ships in the conf directory does not contain a placeholder for tlsCertificatePath, it is also not documented on the website.
If you attempt to start the server with tls, even if your private key and cert are in one PEM file you still need to set this property and tlsKeyStore otherwise you will get: org.apache.bookkeeper.tls.SecurityException: Certificate path is required
I had to look @ https://github.com/apache/bookkeeper/blob/master/bookkeeper-server/src/main/java/org/apache/bookkeeper/conf/AbstractConfiguration.java#L142 to find that I needed to set tlsCertificatePath