#puppethack Fix error when creating XFS on top of another Filesystem

#puppethack: This is to fix the Lvm generated error when creating xfs on top of existing filesystem (returned 1: mkfs.xfs: /dev/mapper/myvg-mylv appears to contain an existing filesystem (ext4)).

Author: stivesso

lib/puppet/provider/filesystem/lvm.rb

@@ -22,7 +22,7 @@ def fstype
     end
 
     def mkfs(fs_type, name)
-        mkfs_params = { "reiserfs" => "-q" }
+        mkfs_params = { "reiserfs" => "-q"  , "xfs" => "-f" }
 
         mkfs_cmd = @resource[:mkfs_cmd] != nil ?
                      [@resource[:mkfs_cmd]] :