Allows requesting a caucase partition and reusing an existing caucase instance.
For client-certificate-based authentication, client must be able to access backend
directly (frontend is not possible).

In the NEO SR, this fixes the permission of the downloaded runTestSuite
template.

This simplistic mail setup does not pass address as command line arguments,
so it is not subject to the vulnerability protected against by this option.

  The version 2.2.0 depends on PyNaCL which is not well configured currently on buildout.

/reviewed-on !175

/reviewed-on !172

/reviewed-on !169

certificate-authority software release and stack was renamed to caucase

This commit contain modifications that allow ocropy and scipy to be
installed as eggs. Extra ld_path are added to python to allow the former
to run scipy (that needs libstdc++) inside testnodes.

Whitespaces matter to exporter.exclude:
- patterns must *not* start with a space
- file *must* end with a newline

Also, de-duplicate paths.

  In order to make an resilient backup, resilience stack wait for the internal backup finishes,
  before proceed to notify the pbs. This commit keeps the default behaviour (wait for 10 min w/o changes),
  however allows test software release adopt a much shorter waiting time (1min).

  With this commit we can accelerate resilience tests in several minutes.

  This fix the real location of the log after use logrotate stack.

Makes it easier to deploy a functional replication setup.