ipareplica: Fix missing parameters for several modules

The parameters master_host_name, config_setup_ca, dirman_password have not
been set for some modules. Also there was no ldap2 connection within
ipareplica_setup_kra. All this resulted in improper configuration where
for example KRA deployment failed in the end.

A conversion warning in ipareplica_setup_adtrust has also been fixed for
the setup_ca parameter.

Fixes #314 (IPA replica installation failure - DS enabled SSL - second part)