yum: Added support for setting yum http proxy

yum/manifests/init.pp

@@ -120,6 +120,11 @@ class yum::plugin::priorities {
 
 # Common prequisites for yum
 #
+# === Global variables
+#
+#   $yum_proxy:
+#       URL of HTTP proxy, for example "http://www.example.local:80/".
+#
 class yum::common {
 
     case $::operatingsystem {
@@ -133,6 +138,19 @@ class yum::common {
         }
     }
 
+    if $yum_proxy {
+        augeas { "yum-enable-proxy":
+            context => "/files/etc/yum.conf/main",
+            changes => "set proxy ${yum_proxy}",
+            tag     => "bootstrap",
+        }
+        augeas { "yum-disable-fastestmirror":
+            context => "/files/etc/yum/pluginconf.d/fastestmirror.conf/main",
+            changes => "set enabled 0",
+            tag     => "bootstrap",
+        }
+    }
+
 }