- Reduced the amount of different exceptions from LDAP attempt so they
can be handled more consistently.
- Added test to cover.
- Also cleaned up LDAP tests to reduce boilterplate mocks.
Fixes#2048
- Removed LDAP specific logic from login controller, placed in Guard.
- Created safer base user provider for ldap login, to be used for SAML
soon.
- Moved LDAP auth work from user provider to guard.