add /etc/nscd.conf template
move configuration to attributes
Describe new attributes for /etc/nscd.conf
consistent formatting (spaces)
disable netgroup caching by default
Update readme from manual page
use hex for cache size, more readable
Add tests for template, update Gemfile, fix rubocop offence
spelling fix
avoid line to long message with unscd

/etc/nscd.conf:12: line is too long
Merge pull request #4 from glensc/COOK-4290

[COOK-4290] Manage /etc/nscd.conf with a template