fix fixtures_symlinks on Windows default tempdir

[tabakhase]

use junction/mklink on windows to allow selfcontaining links
Fixes #97

FileUtils::ln_s works on win, but only if the result is non-recursive?

given repol location C:/dev/control - via git bash (MSYS@win10) tempdir:

• ./.onceover (default) fails
• C:/dev/control/.onceover fails
• ./dummy/.onceover fails
• C:/dev/control/dummy/.onceover fails
• ../controll.onceover works

---

When "using windows tools" the default ./.onceover can be made workable.

Credits to gems/puppetlabs_spec_helper-2.6.2/lib/puppetlabs_spec_helper/rake_tasks.rb 😄

---

turns

DEBUG    -> Symlinking /dev/control/.onceover/etc/puppetlabs/code/environments/production/modules/apache to C:/dev/control/.onceover/spec/fixtures/modules/apache
rake aborted!
Errno::EACCES: Permission denied @ rb_file_s_symlink - (/dev/control/.onceover/etc/puppetlabs/code/environments/production/modules/apache, C:/dev/control/.onceover/spec/fixtures/modules/apache)
C:/dev/control/Rakefile:165:in `block in <top (required)>'

into

DEBUG    -> Symlinking /dev/control/.onceover/etc/puppetlabs/code/environments/production/modules/xinetd to C:/dev/control/.onceover/spec/fixtures/modules/xinetd
DEBUG    -> Running bundle exec rake spec_standalone from C:/dev/control/.onceover
[...] 
Finished in 2.92 seconds (files took 3.41 seconds to load)
20 examples, 0 failures

[dylanratcliffe]

@tabakhase This looks great, will merge once all tests pass

[dylanratcliffe]

Released in v3.6.1