Front transition timeout

src/modules/vtol_att_control/standard.cpp

src/modules/vtol_att_control/standard.h

src/modules/vtol_att_control/vtol_att_control_main.cpp

src/modules/vtol_att_control/vtol_att_control_main.h

src/modules/vtol_att_control/vtol_att_control_params.c