qi_add_test: Also use find_program to find test executable.

Change-Id: I2d76da6f19022cebec05a5a41df25b8ef6aa8e12
Reviewed-on: http://gerrit.aldebaran.lan:8080/18877
Tested-by: gerrit
Reviewed-by: smartin <smartin@aldebaran-robotics.com>
Tested-by: smartin <smartin@aldebaran-robotics.com>
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Reviewed-by: mnottale <mnottale@aldebaran-robotics.com>
Tested-by: mnottale <mnottale@aldebaran-robotics.com>
Fix doc about qibuild create -> qisrc create

Change-Id: I5323232d1651e9637ee805fd4595fbe6261bcfcc
Reviewed-on: http://gerrit.aldebaran.lan:8080/18885
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Tested-by: gerrit
Fix doc about qibuild create -> qisrc create

Change-Id: Iebf41c60396587d686a2c9e58e122b8780434853
Reviewed-on: http://gerrit.aldebaran.lan:8080/18915
Tested-by: gerrit
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>