[dev_setup] Use github for lua-cjson source

This change switches to downloading the source from github to avoid
outage of lua-cjson's author's homepage.

  Test plan:
    Run dev_setup on a vanilla VM and pass BVTs

Change-Id: I8068a5060014b46847cfa288916e282de22fb88a

dev_setup/cookbooks/nginx/attributes/default.rb

@@ -15,7 +15,7 @@ default[:lua][:version] = "5.1.4"
 default[:lua][:simple_version] = lua[:version].match(/\d+\.\d+/).to_s # something like 5.1
 default[:lua][:source]  = "http://www.lua.org/ftp/lua-#{lua[:version]}.tar.gz"
 default[:lua][:path]    = File.join(node[:deployment][:home], "deploy", "lua", "lua-#{lua[:version]}")
-default[:lua][:cjson_source]  = "http://www.kyne.com.au/~mark/software/lua-cjson-1.0.3.tar.gz"
+default[:lua][:cjson_source]  = "http://github.com/mpx/lua-cjson/tarball/ddbb686f535accac1e3cc375994191883fbe35d8"
 default[:lua][:module_path]    = File.join(lua[:path], 'lib', 'lua', lua[:simple_version])
 default[:lua][:plugin_source_path] = File.join(node["cloudfoundry"]["path"], "router", "ext", "nginx")
 

dev_setup/cookbooks/nginx/recipes/default.rb

@@ -28,10 +28,11 @@ when "ubuntu"
     not_if { ::File.exists?(File.join("", "tmp", "lua-#{lua_version}.tar.gz")) }
   end
 
-  remote_file File.join("", "tmp", "lua-cjson-1.0.3.tar.gz") do
+  lua_cjson_tarball = File.join(node[:deployment][:setup_cache], "lua-cjson-1.0.3.tar.gz")
+  remote_file lua_cjson_tarball do
     owner node[:deployment][:user]
     source node[:lua][:cjson_source]
-    not_if { ::File.exists?(File.join("", "tmp", "lua-cjson-1.0.3.tar.gz")) }
+    checksum 'b4e3495dde10d087a9550d3a6f364e8998a5dda4f5f4722c69ff89420c9a8c09'
   end
 
   # Nginx related packages
@@ -110,8 +111,8 @@ when "ubuntu"
     cwd File.join("", "tmp")
     user node[:deployment][:user]
     code <<-EOH
-      tar xzf lua-cjson-1.0.3.tar.gz
-      cd lua-cjson-1.0.3
+      tar xzf #{lua_cjson_tarball}
+      cd mpx-lua-cjson-ddbb686
       sed 's!^PREFIX ?=.*!PREFIX ?='#{lua_path}'!' Makefile > tmp
       mv tmp Makefile
       make