check_once_cc_ccache_remove_credentials
check_once_cc_ccache_remove_credentials(ccache, creds_array[i], ccNoError, "10 ok creds");
check_once_cc_ccache_remove_credentials(ccache, NULL, ccErrBadParam, "NULL creds in param");
check_once_cc_ccache_remove_credentials(ccache, creds_array[0], ccErrInvalidCredentials, "removed same creds twice");
check_once_cc_ccache_remove_credentials(ccache, creds_array[8], ccErrInvalidCCache, "invalid ccache");
cc_int32 check_once_cc_ccache_remove_credentials(cc_ccache_t ccache, cc_credentials_t in_creds, cc_int32 expected_err, const char *description);