minor output improvement


git-svn-id: https://gnunet.org/svn/gnunet@30923 140774ce-b5e7-0310-ab8b-a85725594a96
- Tests did not clean up: TEST_HOME with namestore db was not removed after test
Therefore test_namestore_api_remove_not_existing_record passed when executed on a clean system,
but failed if ran after a previous test adding a record 

- remove unused file namestore/test_namestore_api_put.c


git-svn-id: https://gnunet.org/svn/gnunet@30924 140774ce-b5e7-0310-ab8b-a85725594a96