Change flightmode  stabilize - ALT_HOLD (2 times)

**Details**:
GPS lost signal
altitude measurements unstable (but better)
reduce vibrations
Good results in ALT_HOLD

**Commads**:
*Stabilization problems*:
mavgraph.py 18.BIN "ATT.DesPitch" "ATT.Pitch" --flightmode=apm
mavgraph.py 18.BIN "ATT.DesRoll" "ATT.Roll" --flightmode=apm

*IMU*:
mavgraph.py 18.BIN "IMU.AccX" "IMU.AccY" "IMU.AccZ" --flightmode=apm

*Altitude measurements unstable*:
mavgraph.py 18.BIN "CTUN.BarAlt" "CTUN.Alt" "CTUN.DAlt" --flightmode=apm

*GPS*
mavgraph.py 11.BIN "GPS.Lat" "GPS.Lng" --flightmode=apm