Increase timeout for --run flag integration test

The test fails on JRuby because it takes longer than a second to start
up Overcommit on the JVM. Increase the timeout to 10 seconds to be safe.

Author: sds

spec/integration/run_flag_spec.rb

@@ -26,7 +26,7 @@
     end
 
     it 'completes successfully without blocking' do
-      wait_until { subject }
+      wait_until(timeout: 10) { subject } # Need to wait long time for JRuby startup
       subject.status.should == 0
     end
   end