Revert "Merge pull request #38 from Lirt/fix/broken-mysql-dependency/…

[epcim]

Revert, to prevent other issues on PROD envs related to poor versioning in the formula

This reverts commit 73fe802, reversing
changes made to 13c9ec7.

Related:
#39

[epcim]

The reverted, previous version is not buildable anyway.

[ERROR   ] stderr: W: GPG error: http://ppa.launchpad.net trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8A6844A29F68104E
       W: Failed to fetch http://releases.galeracluster.com/ubuntu/dists/trusty/main/binary-amd64/Packages  404  Not Found
       
       E: Some index files failed to download. They have been ignored, or old ones used instead.
       [ERROR   ] retcode: 100
       [ERROR   ] An error was encountered while installing package(s): W: GPG error: http://ppa.launchpad.net trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8A6844A29F68104E
       W: Failed to fetch http://releases.galeracluster.com/ubuntu/dists/trusty/main/binary-amd64/Packages  404  Not Found
       
       E: Some index files failed to download. They have been ignored, or old ones used instead.
       [ERROR   ] Command '['apt-get', '-q', 'update']' failed with return code: 100