test_basic_ldapagent breaks test_setup_ds_as_non_root* tests

[vashirov]

Issue Description
test_basic_ldapagent creates non-readable by others agent.conf file:

# ls /etc/dirsrv/config/ -la
total 28
drwxr-xr-x. 2 root root    96 Aug  1 09:02 .
drwxr-xr-x. 6 root root    71 Aug  1 09:09 ..
-rw-rw----. 1 root root    91 Aug  1 09:02 agent.conf
-rw-r--r--. 1 root root  1676 May 22 08:44 certmap.conf
-rw-r--r--. 1 root root  1006 May 22 08:44 ldap-agent.conf
-rw-r--r--. 1 root root 15142 May 22 08:44 slapd-collations.conf

It also doesn't delete it after the test is finished.

This breaks test_setup_ds_as_non_root* tests, since dscreate ds-root tries to copy everything under /etc/dirsrv/config to a non-root user directory and fails:

+ dscreate ds-root /home/user1/test_setup_ds_as_non_root_with_default_options/root /home/user1/test_setup_ds_as_non_root_with_default_options/bin
Traceback (most recent call last):
  File "/usr/sbin/dscreate", line 99, in <module>
    result = args.func(inst, log, args)
  File "/usr/local/lib/python3.9/site-packages/lib389/cli_ctl/instance.py", line 220, in prepare_ds_root
    copytree(dir, destdir, dirs_exist_ok=True)
  File "/usr/lib64/python3.9/shutil.py", line 568, in copytree
    return _copytree(entries=entries, src=src, dst=dst, symlinks=symlinks,
  File "/usr/lib64/python3.9/shutil.py", line 522, in _copytree
    raise Error(errors)
shutil.Error: [('/etc/dirsrv/config/agent.conf', '/home/user1/test_setup_ds_as_non_root_with_default_options/root//etc/dirsrv/config/agent.conf', "[Errno 13] Permission denied: '/etc/dirsrv/config/agent.conf'")]

[vashirov]

We don't see this breakage in GH CI because each test suite is executed separately, but when all test suites are ran on the same machine, they can affect execution of the other test suite(s).

[vashirov]

744cb41..edb4356 389-ds-base-2.0 -> 389-ds-base-2.0
86c736b..2c35f73 389-ds-base-2.1 -> 389-ds-base-2.1
8d74381..143ea65 389-ds-base-2.2 -> 389-ds-base-2.2
bd3140f..ca41bf5 389-ds-base-2.3 -> 389-ds-base-2.3