tools: Adding Setting ldap servers for domain

This patch adds support for setting ldap servers for
a given domain when adding/editting a domain.
This patch also removes some main methods which
are no longer in use (all domain management
must be done using the main method of ManageDomains)

Bug-url: https://bugzilla.redhat.com/894681
change-id: Ic0904f9f6d9432ecac1cebee2790dae902a1329c
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>