(SERVER-2003) stub major versions

Recent changes in the apt module are looking for structured facts that arent currently stubbed in postgresql unit tests. This adds those facts so that unit tests pass

Author: eputnam

spec/unit/classes/globals_spec.rb

@@ -8,7 +8,8 @@
           :family               => 'Debian',
           :name                 => 'Debian',
           :release => {
-            :full => '6.0'
+            :full => '6.0',
+            :major => '6'
           }
         },
         :osfamily               => 'Debian',

spec/unit/classes/repo_spec.rb

@@ -7,7 +7,8 @@
         :name                 => 'Debian',
         :family               => 'Debian',
         :release => {
-          :full               => '6.0'
+          :full               => '6.0',
+          :major              => '6'
         }
       },
       :osfamily               => 'Debian',

spec/unit/classes/server_spec.rb

@@ -7,7 +7,8 @@
         :family  => 'Debian',
         :name => 'Debian',
         :release => {
-          :full => '6.0'
+          :full => '6.0',
+          :major => '6'
         }
       },
       :osfamily => 'Debian',