Add connection failure recovery to IPAdmin
    
    Recover from connection failures in IPAdmin LDAP bind functions and
    rather try reconnect in scope of a given timeout instead of giving
    up after the first failed connection.
    
    The recovery fixes ipa-ldap-updater on F-16 which always failed
    because of a missing dirsrv socket.
    
    https://fedorahosted.org/freeipa/ticket/2175