Add the --setup-playbook option for dtf-run-remote which allows us
to submit configuration (or any) playbook which will be included
into the default one, executed before actual testing.

* controller/Makefile.am: s/fedora.yml/default.yml/.
* controller/bin/dtf-controller.in: Call dtf-remote-run with
--setup-playbook option.
* controller/bin/dtf-run-remote.in: Fix the option parsing.  Add
new option --setup-playbook.
(error): New function.
(die): Use '$*' instead of '*@'.
* controller/share/dtf-controller/ansible/playbooks/fedora.yml:
Rename to default.yml.
* controller/share/dtf-controller/ansible/playbooks/default.yml:
Moved from fedora.yml.
* controller/share/--/--/playbooks/include/prepare-testenv.yml:
Removed hard-wired configuration.

First part of converting controller to autoconf/automake solution.

* .gitignore: New gitignore; autotools ignores.
* Makefile.am: New file.
* get_machine: Renamed to template bin/dtf-get-machine.in.
* bin/dtf-get-machine.in: New template based on get_machine.
* run_remote: Renamed to template bin/dtf-run-remote.in.
* bin/dtf-run-remote.in: New binary template from run_remote.
* build: New bootstrap like helper script (git-only).
* configure.ac: New file.
* etc/dtf.sh.in: Likewise.
* ansible_helpers/wait-for-ssh: Renamed to
libexec/dtf-wait-for-ssh.
* share/dtf-controller/parse_credsfile: Reworked script for
parsing OS credentials.
* parse_credsfile: Moved to share/dtf-controller.
* libexec/dtf-wait-for-ssh: Renamed from wait-for-ssh.
* ansible/*: Moved into share/dtf-controller/ansible/*.
* share/dtf-controller/ansible/vars/generated-vars.yml.in: New
template file exporting configure-time variables into playbooks.