qisrc.project: do not serialize qiproject_xml attribute
qisrc.project: do not serialize qiproject_xml attribute

Useless

Change-Id: Ic3f35042b238761ea60a5ec22c038621b9f78f94
Reviewed-on: http://gerrit.aldebaran.lan/62719
Tested-by: gerrit
Reviewed-by: vbarbaresi <371b46c96c99af52f4f920034e4fcb63ece5bdb5@aldebaran-robotics.com>

aldebaran/qibuild,aldebaran/qibuild,aldebaran/qibuild,aldebaran/qibuild