Added all the necessary documentation for imu_graphs so that the package would pass checks.
Added all the necessary documentation for imu_graphs so that the package would pass checks.


Former-commit-id: b0c76ea37eec7d304adfd71260e65713823fbf12
SMAC-Group/gmwm,SMAC-Group/gmwm,SMAC-Group/gmwm,SMAC-Group/gmwm