Refactor debmon repository feature

rename use_debmon to use_debmon_repo, merge debmon_repo class to install class

Signed-off-by: Nick Chappell <nick@intronic.org>

manifests/server/debmon_repo.pp

@@ -1,14 +0,0 @@
-class icinga2::server::debmon_repo {
-  
-  apt::source { 'debmon':
-    location          => 'http://debmon.org/debmon',
-    release           => "debmon-${lsbdistcodename}",
-    repos             => 'main',
-    key_source        => 'http://debmon.org/debmon/repo.key',
-    key               => 'BC7D020A',
-    include_src       => false,
-    # backports repo use 200
-    pin               => '300'
-  }
-
-}