adding defined type independent of nrpe to manage check plugin (scripts)

Signed-off-by: Nick Chappell <nick@intronic.org>
adding new parameter for checkplugin_libdir to keep backwards compatibility

Signed-off-by: Nick Chappell <nick@intronic.org>
updating checkplugin_libdir for centos machies

Signed-off-by: Nick Chappell <nick@intronic.org>
moving to using templates as the content source

Signed-off-by: Nick Chappell <nick@intronic.org>
allow either source or content to be used as the file distribution method

Signed-off-by: Nick Chappell <nick@intronic.org>
Merge branch 'pr/27/server_check_plugin_defined_type'

Merged in from: https://github.com/Icinga/puppet-icinga2/pull/27