contact_translator.py and simulate_torso_spring.py not working.

[pushkalkatara]

1. pr2_simulator/pr2_gazebo/scripts/pr2_fingertip_pressure_contact_translator.py

   Line 49 in 5757754

   from gazebo_plugins.msg import ContactState, ContactsState

gazebo_plugins.msg replaced with gazebo_msgs.msg

pr2_simulator/pr2_gazebo/scripts/pr2_simulate_torso_spring.py

Line 46 in 5757754

from gazebo.msg import *

gazebo.msg replaced with gazebo_msg
gazebo.srv replaced with gazebo_msgs.srv

But still no changes in Gazebo.