Rename macro and fix prefix (#17)

Author: MarqRazz

robotiq_description/urdf/robotiq_gripper_macro.urdf.xacro renamed to robotiq_description/urdf/robotiq_2f_85_macro.urdf.xacro

@@ -47,7 +47,7 @@
             <!-- When simulating we need to include the rest of the gripper joints -->
             <xacro:if value="${use_fake_hardware or sim_isaac or sim_ignition}">
                 <joint name="${prefix}robotiq_85_right_knuckle_joint">
-                    <param name="mimic">robotiq_85_left_knuckle_joint</param>
+                    <param name="mimic">${prefix}robotiq_85_left_knuckle_joint</param>
                     <param name="multiplier">-1</param>
                     <xacro:unless value="${sim_ignition}">
                         <command_interface name="position"/>
@@ -56,7 +56,7 @@
                     </xacro:unless>
                 </joint>
                 <joint name="${prefix}robotiq_85_left_inner_knuckle_joint">
-                    <param name="mimic">robotiq_85_left_knuckle_joint</param>
+                    <param name="mimic">${prefix}robotiq_85_left_knuckle_joint</param>
                     <param name="multiplier">1</param>
                     <xacro:unless value="${sim_ignition}">
                         <command_interface name="position"/>
@@ -65,7 +65,7 @@
                     </xacro:unless>
                 </joint>
                 <joint name="${prefix}robotiq_85_right_inner_knuckle_joint">
-                    <param name="mimic">robotiq_85_left_knuckle_joint</param>
+                    <param name="mimic">${prefix}robotiq_85_left_knuckle_joint</param>
                     <param name="multiplier">-1</param>
                     <xacro:unless value="${sim_ignition}">
                         <command_interface name="position"/>
@@ -74,7 +74,7 @@
                     </xacro:unless>
                 </joint>
                 <joint name="${prefix}robotiq_85_left_finger_tip_joint">
-                    <param name="mimic">robotiq_85_left_knuckle_joint</param>
+                    <param name="mimic">${prefix}robotiq_85_left_knuckle_joint</param>
                     <param name="multiplier">-1</param>
                     <xacro:unless value="${sim_ignition}">
                         <command_interface name="position"/>
@@ -83,7 +83,7 @@
                     </xacro:unless>
                 </joint>
                 <joint name="${prefix}robotiq_85_right_finger_tip_joint">
-                    <param name="mimic">robotiq_85_left_knuckle_joint</param>
+                    <param name="mimic">${prefix}robotiq_85_left_knuckle_joint</param>
                     <param name="multiplier">1</param>
                     <xacro:unless value="${sim_ignition}">
                         <command_interface name="position"/>