- Reenable testsuite
* Pass || : as some of the tests fail with UNKNOWN-EDIR this means
the testsuite needs localy running ldap server to communicate with
as such it does not make sense to fix those FAILED (errors=39)

- update to version 2.4.1
* tested against pyasn1 from version 0.1.8 up to version 0.4.2, Python 2.6.6, Python 2.7.14, Python 3.6.4
* auto_encode parameter is honored when binding (thanks jkolo)
* fixed organizationalName definition in oid (thanks mingulov)
* automatic byte to int conversion working again (thanks Brian)
* mock connection searchs correctly escape filters (thanks kiddick)
* fixed bind with not unicode characters in Python 2 (thanks jkolo)
* extended filter attributes should work again with pyasn1 0.4.1 (thanks Dirk-jan)
* fixed error when reading incomplete server info
* NOT keyword properly handled in dit_content_rules (thanks Michael)
* operational attributes are prorerly returned in Cursor whit get_operational_attributes = True (thanks a23s4a)
* start_tls() is properly executed with AD when raise_exceptions=True (thanks Andrew)
* reopening a Connection honours auto_bind setting (thanks calken)
* an attribute returned with no value from a flaky server doesn't raise exception anymore (thanks Terrence)
* pwdLastSet in AD is valid only for -1 (thanks Thane)
* fixed docs for ldifProducer (thanks lhoekenga)
* fixed monkeypatching of pyasn1 for Boolean Value in BER encoding (thanks tmarlok88)
* check_names was not honoured while validating attribute values (thanks ymcymc)
* locks refactored in Connection and in Async strategy
* socket properly closed when checking availability of an invalid server
* security fix in the rebind() method of the Connection object (thanks Daniel)
* fix for Sasl credentials in Python 3 (thanks Busuwe)
* fixed bug when checking for equality in MockBase
* added validator parameter to Server object for custom validators
* attribute values are now validated in add/compare/modify operations in the Connection object