adding Ubuntu20 support, chg ldapManager to ldapManagerDN; chg: ldapDomain to ldapBase

You sure this is the right Hash, I would think its ldapMonitorDnHash.stdout

unless sharing the password between cn=monitor and cn=ro_user

@kerriw ^ where is this defined in the first place ? the binddnuserpassword is in passwords.yml. last time I checked there was no monitoruser

This is a new requirement, so there is no existing password in the playbooks. We need to create a new password for this new user @handreas

mentioned in commit 0a7000b3

merged