KNOX-366 - detect stale pid file a allow server start in its presence.
KNOX-367: add support for new config param userSearchAttributeName
KNOX-370: add support for new config param userObjectClass
KNOX-368: add support for new config param userSearchBase
KNOX-369: add support for new config param groupSearchBase
KNOX-371: group membership lookup need to use userdn computed by search
KNOX-372: add unit tests to check default values for userSearchAttributeName, userObjectClass
KNOX-373: add unit tests to verify default values for userSearchBase, groupSearchBase
KNOX-374: KnoxLdapRealm does not default values correctly for userSearchBase and groupSearchBase
KNOX-377 - detect stale pid and allow ldap server to restart in its presence