Fix COOK-3931, COOK-3945, COOK-3966, COOK-3974, COOK-4001 re: debian/ubuntu installation

I am approved contributor [1260 Jose Diaz-Gonzalez](https://wiki.opscode.com/display/chef/Approved+Contributors). I have therefore already signed the CLA.

Pull request can be merged in from `josegonzalez/mysql`, `master` branch.

Commits:

    [COOK 3974] Template out debian.cnf file before issuing restart
    [COOK 4001] only create /etc/init/mysql.conf on the ubuntu platform
    [COOK 3931] Move ubuntu-12 init-mysql.conf.erb template to default specificity
    Run specs on Ubuntu 13.04

Fixes the following COOK tickets (Potentially others, I can't figure out how jira works):

- [COOK-3931](https://tickets.opscode.com/browse/COOK-3931)
- [COOK-3945](https://tickets.opscode.com/browse/COOK-3945)
- [COOK-3966](https://tickets.opscode.com/browse/COOK-3966)
- [COOK-3985](https://tickets.opscode.com/browse/COOK-3985)
- [COOK-3974](https://tickets.opscode.com/browse/COOK-3974)
- [COOK-4001](https://tickets.opscode.com/browse/COOK-4001)
- [COOK-4071](https://tickets.opscode.com/browse/COOK-4071)

Consolidated PRs:

- opscode-cookbooks/mysql#128
- opscode-cookbooks/mysql#132
- opscode-cookbooks/mysql#137
- opscode-cookbooks/mysql#144
- opscode-cookbooks/mysql#146

*Please* merge this in sooner rather than later.