Added option to ldap auth module to allow configuring ldap to skip tls certificate verification. An option was also added to allow searches to be performed anonymously instead of requiring a user for the initial bind. The failed to bind error was also modified to print the detailed text regarding the ldap error
removed some unneeded quotes from a docstring
Merge pull request #5339 from KennethWilke/develop

Added extra options to ldap authentication module, added ldap detailed error to bind failure message