merging PR Chaosthebot#519: Update comment in chaos_wrapper.sh after …

…changes of Chaosthebot#418

Chaosthebot#519: Update comment in chaos_wrapper.sh after changes of Chaosthebot#418

Description:
Chaosthebot#418 changed the time threshold for rolling back changes. However, the corresponding comment was not updated to reflect this.

This PR adjusts the comment of chaos_wrapper.sh to fix this.

:white_check_mark: PR passed with a vote of 7 for and 0 against, a weighted total of 7.0 and a threshold of 6.5, and a current meritocracy review.

Vote record:
@PlasmaPower: 1
@andrewda: 1
@JustynC7: 1
@mark-i-m: 1
@rhengles: 1
@rlee287: 1
@rudehn: 1

chaos_wrapper.sh

@@ -17,7 +17,7 @@ function rollback() {
     supervisorctl update
 }
 
-# time the chaos server... if it crashes in 60s, then attempt a rollback
+# time the chaos server... if it crashes before 15 minutes, then attempt a rollback
 start_time=`date +%s`
 /root/.virtualenvs/chaos/bin/python chaos.py
 failed=$?