NSFS | NC | Health | new_buckets_path check access bug fixes

[romayalon]

Environment info

• NooBaa Version: master
• Platform: NC

Actual behavior

1. The new_buckets_path access check of the account is based on uid/gid of the account, although account can be based on user (distinguished name).
2. The checkAcceess()/ stat() functions used by the health script to check permissions of an account to its new_buckets_path check only read permissions.

Expected behavior

1. Health script should be able to check if an account can access new_buckets_path when having user (distinguished_name) instead of uid/gid.
2. Health script should check also write permissions of an account to its new_buckets_path.

Steps to reproduce

distinguished name issue -

1. Create an account while specifying a distinguished name instead of uid and gid
2. Run the health script and check the result.

write permissions issue -

1. Create an account with only read permissions to its new_buckets_path.
2. Run the health script and check the result.

More information - Screenshots / Logs / Other output

[romayalon]

this was fixed on #7765, adding request validation label