Reduce JRuby flakyness by giving it more time to finish

Startup time is still very much a problem with JRuby, hence
feature type aruba cukes that invoke rspec a lot of times
are still problematic. The bisect specs do this to the extreme,
resulting in long spec run times. Locally a single scenario
takes 36 seconds to run for me, on a 4-core desktop computer.
An overloaded CI might take longer, hence just double the timeout
and hope it's enough. Nothing much else we can do.

ref: rspec#2442

Author: PragTob

features/support/env.rb

@@ -5,7 +5,7 @@
   set_env('SHELL', '/usr/bin/bash')
 
   if RUBY_PLATFORM =~ /java/ || defined?(Rubinius)
-    @aruba_timeout_seconds = 60
+    @aruba_timeout_seconds = 120
   else
     @aruba_timeout_seconds = 10
   end