This reverts commit d64008dd.

Unfortunately innobackupex manual page lied about possibility to pass
directly path of backup agent, so it is required to rely on PATH
manipulation.

Because https prompts buildout process, use http instead

runUnitTest finding all tests

It is possible to tell to innobackupex full path of backup agent, and as
explicit shall be preferred, use such way.

zerokspot.recipe.git calls git binary, but it is not possible to control
on part level which git shall be used.

Rather than creating each and altering them later.
Also, factorise a few property accesses.
Also, move setInitialState call closer to state creation code.

Created workflow is not empty, and that's the whole point of this code.

internal to the repository)

Moreover use SlapOS patched buildout functionality in order to have
local/remote usage.

Moreover slapos buildout patches are used to fetch them
locally/remotely.

This tool allow to have hot backups of mysql. innobackupex is referred
directly, but xtrabackup_51 is just linked into instance bin directory,
which will be later passed in environment.