[cobbler integration] move preseed to init and symlink cobbler.conf

Move preseed to init and add cobbler symlink
use name cisco-preseed
add cobbler yaml sync script
install cobbler_sync script and execute each pass
move sync script to module files directory
only run sync on change of cobbler.yaml
fix typo in exception
ensure symlink exists
add preseed templating and purge node after removal
Create cisco-preseed.template

add the preseed template
write preseed if it does not exist and add preseed template file.
modify expected location of cobbler.yaml
fix missing slash
preseed fixes if preseed section is not defined
add cobbler.conf file with Location stanza
add cobbler.conf template loading
Merge pull request #51 from cbaesema/havana

[cobbler integration] move preseed to init and symlink cobbler.conf