aaa: Server in LdapServers option are separated by ';'

LDAP servers in ConfigValue.LdapServers option are separated by
semicolon.

Topic: AAA
Change-Id: I5da2f60b889febb6fba7d8a06a1830f573802106
Bug-Url: https://bugzilla.redhat.com/1111071
Signed-off-by: Martin Perina <mperina@redhat.com>