Bump titus proto definitions

[sargun]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 1097

• 1 of 34 (2.94%) changed or added relevant lines in 1 file are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 25.831%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
api/netflix/titus/agent.pb.go	1	34	2.94%

Files with Coverage Reduction	New Missed Lines	%
launchguard/client/client.go	3	72.11%

Totals
Change from base Build 1092:	-0.1%
Covered Lines:	2409
Relevant Lines:	9326

---

💛 - Coveralls

[codecov]

Codecov Report

Merging #130 into master will decrease coverage by 0.11%.
The diff coverage is 3.7%.

@@            Coverage Diff             @@
##           master     #130      +/-   ##
==========================================
- Coverage   35.71%   35.59%   -0.12%     
==========================================
  Files          65       65              
  Lines        7353     7380      +27     
==========================================
+ Hits         2626     2627       +1     
- Misses       4427     4452      +25     
- Partials      300      301       +1

Impacted Files	Coverage Δ
api/netflix/titus/agent.pb.go	26.86% <3.7%> (-1.67%)	⬇️
executor/runtime/docker/docker.go	50.74% <0%> (-0.3%)	⬇️
executor/runner/runner.go	65.31% <0%> (+0.93%)	⬆️