Fix permissions before migrations

[Silex]

This fixes permissions issues when you bind a host volume to /usr/src/redmine/log in order to have the logs outside.

This is visible due to the contacts helpdesk plugin, without it the migration works but is redirected to STDERR which is why it was not noticed before I think.

....
Using rbpdf 1.19.3
Using redcarpet 3.4.0
Using redmine_crm 0.0.37
Using request_store 1.0.5
Using rmagick 2.16.0
Using roadie 3.2.2
Using roadie-rails 1.1.1
Using ruby-ole 1.2.12.1
Using spreadsheet 0.6.9
Using vcard 0.2.15
Bundle complete! 36 Gemfile dependencies, 60 gems now installed.
Gems in the groups development and test were not installed.
Bundled gems are installed into `/usr/local/bundle`
Rails Error: Unable to access log file. Please ensure that /usr/src/redmine/log/production.log exists and is writable (ie, make it writable for user and group: chmod 0664 /usr/src/redmine/log/production.log). The log level has been raised to WARN and the output directed to STDERR until the problem is fixed.
rake aborted!
Errno::EACCES: Permission denied @ rb_sysopen - /usr/src/redmine/log/redmine_helpdesk.log
/usr/src/redmine/plugins/redmine_contacts_helpdesk/lib/redmine_helpdesk.rb:36:in `new'

Should I also modify the templates in the subdirectories?

[Silex]

👍