Sometimes the compile will emit the following warning, so we'll just avoid it by making it call a function in the LDAP module which will never have this problem.
warning: :GenServer.call/2 is undefined (module :GenServer is not available or is yet to be defined)
Ensure if LDAP GenServer crashes it gets cleaned up, and we should crash and restart if somehow the eldap connection process crashes unexpectedly as we can't seem to receive any DOWN messages from it, etc.
This adds a GenServer which will keep an LDAP connection open and auto reconnect on failure with a 5 second wait between retries. Another benefit is this prevents parsing the Root CAs for every login attempt as we only need to do it once per connection.
