[Bug] Excel Technique worksheet Tactic Column incorrect values

[jondricek]

Expected Behavior

The attackToExcel module produces Excel files that have Tactic names in the Tactic column on Technique worksheets.

Actual Behavior

The attackToExcel module produces Excel files that have Tactic names that are oddly figured out in the Tactic column on Technique worksheets. The problematic logic can be found here

Steps to Reproduce the Problem

1. Run the attackToExcel module
2. Look at Excel files

Possible Solution

Instead of attempting to title() case the string, replacing dashes with spaces, just go look up the Tactic STIX object it is referencing and use it's name field.