Add _FATAL_EXCEPTION_FORMAT_ERRORS global.

Add a new global variable to control when exception format errors
are fatal. The goal is to be able to use this at test time to detect
incorrectly formatted exceptions.

Change-Id: Ia015bc27a445757cb1d574cadc35698cca0de086
Update ldap exceptions to pass correct kwargs.

Updates a few LDAP exceptions to pass the correct kwargs
for formatting.

Change-Id: I6b04faa5743d95b0dd707ad3679d25226cace9be
Merge "Add _FATAL_EXCEPTION_FORMAT_ERRORS global."
Merge "Update ldap exceptions to pass correct kwargs."