get-bugzilla-attachments-by-mimetype: make this run on Python 3
get-bugzilla-attachments-by-mimetype: make this run on Python 3

Change-Id: I27cf30c62122ea191c852a1a298a40ef64d35ba9

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core