* Add LDAP Key Synchronization feature
Signed-off-by: Magnus Lindvall <magnus@dnmgns.com>
* Add migration: add login source id column for public_key table
* Only update keys if needed
* Add function to only list pubkey synchronized from ldap
* Only list pub ssh keys synchronized from ldap. Do not sort strings as ExistsInSlice does it.
* Only get keys belonging to current login source id
* Set default login source id to 0
* Some minor cleanup. Add integration tests (updete dep testify)
* Add LDAP service for tests
* Add LDAP login source and test user sign-in
* Add checks to test if user data is correct
* Add LDAP user sync test
* Add failed user sign-in test
