Autotest-client: Adds possibility to exclude list of strings.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
Autotest-server: Adds posibility to exclude files/dirs.

Adds possibility to exclude files/dirs from tar
package distributed to guest.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
frontend/pkgdeps: Add pylint and passwd

In order to make it easier to execute the checks required
for autotest regression, bring in pylint and passwd when
installing the dependent packages.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>