1153344 - Allow Mongo connections over SSL.

[bowlofeggs]

https://bugzilla.redhat.com/show_bug.cgi?id=1153344

[bmbouter]

thanks

[bmbouter]

Currently when you have ssl=false (the defualt) the code produces the following error:

pulp.server.db.connection:CRITICAL: Database initialization failed: ssl has not been enabled but the following ssl parameters have been set: ssl_cert_reqs, ssl_ca_certs. Please set `ssl=True` or remove.

This is because the checking for ssl settings is not conditional on the yes/no of ssl overall in logic in connection.py near lines 57-65. The default settings get passed through and on my installation of mongo that causes it not to work. Since we want default settings, we should adjust the logic to only include the other settings when ssl=true.

[bmbouter]

I think 3 things should be adjusted, and then its good to merge:

1. The logic should be adjusted so it doesn't break out with the ssl=false config (see comment above with error message).
2. The server/pulp/server/config.py should have defaults for all values in the config
3. The defaults from (2) should be reflected in the server.conf commented out defaults.

[bowlofeggs]

I've made my fixes in response to the comments, but since there is no test coverage on our connection module I will need some time to hand test these changes before merging.

@bmbouter you are welcome to check out/try the changes as well if you like.