SEC-1953: Spring Security Java Config support

This is the initial migration of Spring Security Java Config from the
external project at
https://github.com/SpringSource/spring-security-javaconfig

config/src/integration-test/resources/users.ldif

@@ -0,0 +1,42 @@
+dn: ou=groups,dc=springframework,dc=org
+objectclass: top
+objectclass: organizationalUnit
+ou: groups
+
+dn: ou=people,dc=springframework,dc=org
+objectclass: top
+objectclass: organizationalUnit
+ou: people
+
+dn: uid=admin,ou=people,dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: Rod Johnson
+sn: Johnson
+uid: admin
+userPassword: password
+
+dn: uid=user,ou=people,dc=springframework,dc=org
+objectclass: top
+objectclass: person
+objectclass: organizationalPerson
+objectclass: inetOrgPerson
+cn: Dianne Emu
+sn: Emu
+uid: user
+userPassword: password
+
+dn: cn=user,ou=groups,dc=springframework,dc=org
+objectclass: top
+objectclass: groupOfNames
+cn: user
+uniqueMember: uid=admin,ou=people,dc=springframework,dc=org
+uniqueMember: uid=user,ou=people,dc=springframework,dc=org
+
+dn: cn=admin,ou=groups,dc=springframework,dc=org
+objectclass: top
+objectclass: groupOfNames
+cn: admin
+uniqueMember: uid=admin,ou=people,dc=springframework,dc=org