Add old path of moved file to list of modified files

[kent-b]

Resolves runatlantis/atlantis#413

[codecov]

Codecov Report

Merging #414 into master will decrease coverage by 0.03%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #414      +/-   ##
==========================================
- Coverage   70.27%   70.24%   -0.04%     
==========================================
  Files          63       63              
  Lines        3896     3898       +2     
==========================================
  Hits         2738     2738              
- Misses        964      966       +2     
  Partials      194      194

Impacted Files	Coverage Δ
server/events/vcs/gitlab_client.go	19.44% <0%> (-0.37%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5d07268...aaf075b. Read the comment docs.

[codecov]

Codecov Report

Merging #414 into master will decrease coverage by 0.03%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #414      +/-   ##
==========================================
- Coverage   70.27%   70.24%   -0.04%     
==========================================
  Files          63       63              
  Lines        3896     3898       +2     
==========================================
  Hits         2738     2738              
- Misses        964      966       +2     
  Partials      194      194

Impacted Files	Coverage Δ
server/events/vcs/gitlab_client.go	19.44% <0%> (-0.37%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5d07268...aaf075b. Read the comment docs.

[lkysow]

Thanks! I'll merge this via #415