Integration tests are failing over a warning

[kenzieschmoll]

The following warning is coming over the stderr stream (see here), and causing the integration tests to fail:

Warning: You are using these overridden dependencies:
 ! devtools_server 0.9.3+4 from path ../devtools_server
 ! devtools_shared 0.9.3+4 from path ../devtools_shared
 ! devtools_testing 0.9.3+4 from path ../devtools_testing

We should not fail the test over a warning.