Add a timeout to bot tests. (#16666)
Add a timeout to bot tests. (#16666)

This will catch the case where tests hang -- and it will
force them to fail so that we see the output from the test.
tvolkert/flutter,cbracken/flutter,cbracken/flutter,cbracken/flutter,cbracken/flutter,Hixie/flutter,flutter/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,cbracken/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,cbracken/flutter,cbracken/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,tvolkert/flutter,Hixie/flutter,tvolkert/flutter,cbracken/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,flutter/flutter