Mismatch between ergoCub 1_0 and 1_1 IMU sensor parent Links

[xela-95]

After #230 I tried to port the modifications manually also to the three urdf models generated from https://github.com/icub-tech-iit/ergocub-software/tree/master/urdf/creo2urdf/data/ergocub1_0 folder (ergoCubSN000, ergoCubGazeboV1, ergoCubGazeboV1_minContacts) but I encountered a mismatch between the parent link of the IMU sensors with respect to the models generated from https://github.com/icub-tech-iit/ergocub-software/tree/master/urdf/creo2urdf/data/ergocub1_1 (ergoCubSN001, ergoCubGazeboV1_1, ergoCubGazeboV1_1_minContacts).

For example in ergoCubGazeboV1_1:

ergocub-software/urdf/ergoCub/robots/ergoCubGazeboV1_1/model.urdf

Lines 3698 to 3707 in 59153cd

	<gazebo reference="l_foot_front">
	<sensor name="l_foot_front_ft_imu" type="imu">
	<always_on>1</always_on>
	<update_rate>100.000000</update_rate>
	<pose>0 0 0 1.25667e-16 2.20112e-17 -2.0944 </pose>
	<plugin name="ergocub_yarp_gazebo_plugin_IMU" filename="libgazebo_yarp_imu.so">
	<yarpConfigurationFile>model://ergoCub/conf/gazebo_ergocub_l_foot_front_ft_sensor_inertial.ini</yarpConfigurationFile>
	</plugin>
	</sensor>
	</gazebo>

while in ergoCubGazeboV1 is:

ergocub-software/urdf/ergoCub/robots/ergoCubGazeboV1/model.urdf

Lines 2896 to 2904 in 59153cd

	<gazebo reference="l_ankle_2">
	<sensor name="l_foot_front_ft_imu" type="imu">
	<always_on>1</always_on>
	<update_rate>100</update_rate>
	<pose>0.13525 0 -0.07019999999999993 0.0 -0.0 -2.0943952105869315</pose>
	<plugin name="ergocub_yarp_gazebo_plugin_IMU" filename="libgazebo_yarp_imu.so">
	<yarpConfigurationFile>model://ergoCub/conf/gazebo_ergocub_l_foot_front_ft_sensor_inertial.ini</yarpConfigurationFile>
	</plugin>
	</sensor>

This issue precludes the usage of the same .ini file for both models.

CC @traversaro