This patch fixes the following memory issues in daos_test:

  - IO13 (basic_byte_array) may read beyond the end of buf_out.

  - REBUILD6 (rebuild_snap_update_recs) may write beyond the end of
    string.

  - ARRAY19 (test_async_io) may write beyond the end of dkey_str[].

  - daos_start_server can't just increment svc->rl_nr without making
    sure that svc->rl_ranks matches svc->rl_nr.

Signed-off-by: Li Wei <wei.g.li@intel.com>
Required-githooks: true

DAOS-16251 tests: Fix EC2 use-after-scope

Signed-off-by: Li Wei <wei.g.li@intel.com>
Required-githooks: true

Signed-off-by: Li Wei <wei.g.li@intel.com>
Required-githooks: true

Required-githooks: true