Revert "Add "sslMode = requireSSL" if ssl is used"
Revert "Add "sslMode = requireSSL" if ssl is used"

sslMode can't be used with sslOnNormalPorts. It'll get the following
error:

    SEVERE: Failed global initialization: BadValue net.ssl.mode is not allowed when net.ssl.sslOnNormalPorts is specified

This reverts commit 1877d30a6db0f19d027071a2939abb6821445839.

discovery-digital/puppetlabs-mongodb,discovery-digital/puppetlabs-mongodb,discovery-digital/puppetlabs-mongodb,noris-network/puppetlabs-mongodb,noris-network/puppetlabs-mongodb,noris-network/puppetlabs-mongodb,discovery-digital/puppetlabs-mongodb