reload_action mysql

I'm setting lots of tunables, most of them can be applied after server `restart`, meaning `reload` action fails (as expected). I need an ability to use `restart` instead of `reload`

 Neither [pull request #155](https://github.com/opscode-cookbooks/mysql/pull/155), nor [pull request #140](https://github.com/opscode-cookbooks/mysql/pull/140) helped in my case.
They still schedule at least 1 `reload` action.

Added attribute:
    default['mysql']['server']['reload_action']    = 'reload' 

See also #155 and #140.