Try to split into three separate components -> controller, tester,
and 'tasks' (postgresql-tasks in our case).  The controller
component is the main part which is able to run the task remotely.
Tester is more-like library for 'tasks' component (should be
reusable on the raw git level).

* controller: Almost separated component.
* postgresql-tasks: Likewise.
* tester: Likewise.

For that purpose you may use '--extra-rpms-file FILE' option where
the file contains list of rpms to be installed.  The RPMs should
be defined like accessible URLs from testing machine.

Also, export the overall log file as dtf-run.overview.

* run_remote: Add new option --extra-rpms-file.
* ansible/fedora.yml: Include conditionally the
additional-packages playbook.  Generate the dtf-run.overview.
* ansible/include/additional-packages.yml: New playbook used to
install explicit list of additional packages.
* ansible/include/download-results.yml: Fix to download also
dtf-run.overview file.

Better define configuration and provide examples.

* controller: Unpack results to correct directory, load the
configuration from new place, call run_remote with proper
arguments, generate 'results.html' with result_stats script.
* ansible/run_include: Adjust to better simulate run_remote.
* ansible/fedora.yml: Adjust for fixed configuration.
* run_remote: Likewise. Also small issues with option parsing
fixed.
* config.sh.template: Moved as config/config.sh.template.
* config/config.sh.template: Copyyed from /config.sh.template,
better documented options.
* run: Fix typo - use 'while read i' instead of 'for i in'.
* config/os/EXAMPLE.sh: New file - exmaple configuration.
* private/os/EXAMPLE.yml: Likewise.
* config/hosts.template: Likewise.
* dist.include: New file with file patterns that should be
distributed to test machine.
* dist: Distribute only those files which are necessary.
* config/.gitignore: New gitignore file.

* run_remote: Do $subject by incorporating getopt.

* ansible/dummy-wrapper.yml: Helper playbook to directly invoke
"included" playbooks.
* ansible/fedora.yml: The "main" playbook (new file).
* ansible/include/beakerlib.yml: New file, install beakerlib
remotely.
* ansible/include/prepare-testenv.yml: Install the test
dependencies remotely.
* ansible/run_include: Helper script to run included playbooks.
* dist: Do not distribute ansible playbooks in tarball.
* get_machine: Helper script to obtain openstack machine, not
used currently.
* lib_pgsql.sh: Assert for PG_VERSION, not for datadir (as it by
default exists after postgresql-server installation.
* run_remote: Helper script invoking the main ansible playbook.
* ansible_helpers/wait-for-ssh: Helper script as 'wait_for' is
broken?
* README: Document.
* .gitignore: Ignore private files.