QtQa: Enabling configurable build publishers
QtQa: Enabling configurable build publishers

Added support to configure jenkins publishing plugins usage per
job. Now supporting xUnit plugin and Build publisher plugin.

Task-number: QTQAINFRA-689
Task-number: QTQAINFRA-783
Change-Id: I65dad2eb07e8d935e203b94608bcc0b483a884fe
Reviewed-by: Tony Sarajärvi <9f5d03eac1d5fa677086d4fb7148df11e4536984@digia.com>

tsarajar/qtqa,tsarajar/qtqa,tsarajar/qtqa,tsarajar/qtqa