Add missing slave mode to Debian defaults file

This fixes #154.
Fix lint in puppet-lint 1.0.0+
Merge pull request #170 from maestrodev/lint-1.0.0

Fix lint in puppet-lint 1.0.0+
Fixing bug: if the settings of the class jenkins::slave change, the file '/etc/default/jenkins-slave' will be updated and the service jenkins-slave should to be notified.
Merge pull request #173 from facastagnini/master

jenkins::slave fails to refresh the service
Merge pull request #157 from dealnews/slave_mode_debian_fix

Add missing slave mode to Debian defaults file
A bit of RedHat and Debian slave initd script merging

Add -mode flag to Debian slave start script
Use a single /etc/defaults or /etc/sysconfig file for both OSes
Do not customize /etc/init.d/jenkins-slave, do it in sysconfig or defaults
Log output to file in RedHat
Compose slave arguments in shell script