test: Add igor plugin

The plugin contains a service which communicates with the igor daemon.
This is needed to run testcases within an instance.

Change-Id: I5bd03d8f19b1fa3d47e5e5efb2fbd5ab6f5535f4
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
tests: Add terminal_has_utf8_support testcase

This testcases checks if the terminal supports UTF-8.

Change-Id: I4b4fb5c60ca207dd34764693c9356d835c1608b8
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>