UBI sensor initialization timeout

Port of the UBI initialization timeout introduced by Shadow for UBI hands.
Be aware this pull request also adds pr2grant in sr_edc_launch which you might not want. Don't hesitate to remove it.


It's a good practice to put things in the initialization list in the same order as they are declared. Since that's the order they will be initialized anyway it would help to identify bugs. Since I (presume I) don't have write access to your repo please sift the above after the member called tactiles_init or move the declaration in the header file. Both fine with me.