EPL: Fix for Write Multiple by index

 Write multiple by index now correctly resolves OD names.

Change-Id: I4d2aad584a47e3682716b95bdda0bc49c3a29d96
Signed-off-by: Lukas Emersberger <lukas.emersberger@gmail.com>
Reviewed-on: https://code.wireshark.org/review/3223
Reviewed-by: Roland Knall <rknall@gmail.com>
Reviewed-by: Lukas Emersberger <lukas.emersberger@br-automation.co.at>
Reviewed-by: Evan Huus <eapache@gmail.com>