Fix ldapmodify, ldapcompare and ldapdelete tests + add new tests

Christophe Sovant

18.32.2007 e430b73a801814cd9b03c03f00b86d38406a25b1

opends/tests/functional-tests/testcases/clu/cluBase64.xml does not exist in tree 2c43692e120196030ed628430762f755038dd7c1