Update init_test.dart
Update init_test.dart

Increase the test timeout for the `init` test to 2 minutes (test was timing out downloading assets on appveyor).
Hixie/flutter,cbracken/flutter,jason-simmons/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,turnidge/flutter,flutter/flutter,flutter/flutter,turnidge/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,aghassemi/flutter,Hixie/flutter,aghassemi/flutter,turnidge/flutter,Hixie/flutter,jason-simmons/flutter,Hixie/flutter,Hixie/flutter,turnidge/flutter,tvolkert/flutter,jason-simmons/flutter,cbracken/flutter,Hixie/flutter,Hixie/flutter,flutter/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,cbracken/flutter,turnidge/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,cbracken/flutter,Hixie/flutter,cbracken/flutter,aghassemi/flutter,aghassemi/flutter,Hixie/flutter,flutter/flutter,flutter/flutter,flutter/flutter,jason-simmons/flutter,cbracken/flutter,tvolkert/flutter