Fix permissions on folders

Description

The ./artifacts/configs folder is created with the permissions 0600 when executing gosdn. This is unusual because it allows reading and writing into a folder by the owner but doesn't allow the owner to actually traverse or view the contents of this folder.

Expected Behavior

User can enter ./artifacts/configs and do 'ls -alh ./artifacts/configs' and get the contents of the folder.

Actual Behavior

The folder can't be traversed and 'ls -alh ./artifacts/configs' yields questionmarks.

Possible Fix

The function in question is 'ensureFileSystemPathExists()' in 'controller/cmd/root.go'. The MkdirAll() call should receive '0700' and not '0600'.

Steps to Reproduce

1. Make sure ./artifacts/configs folder doesn't exist.
2. Execute ./artifacts/gosdn (no parameter)
3. Observe that ./artifacts/configs was created
4. Execute 'ls -alh ./artifacts/configs' and take note of output