Use POSIX::Spawn to make foreman ruby 1.8 compatible and have all specs passing.

spec/spec_helper.rb

@@ -36,7 +36,12 @@ end
 
 def forked_foreman(args)
   rd, wr = make_pipe
-  Process.spawn("bundle exec bin/foreman #{args}", :out => wr, :err => wr)
+  if Foreman.jruby_18? || Foreman.ruby_18?
+    require 'posix/spawn'
+    POSIX::Spawn.spawn({}, "bundle exec bin/foreman #{args}", :out => wr, :err => wr)
+  else
+    Process.spawn("bundle exec bin/foreman #{args}", :out => wr, :err => wr)
+  end
   wr.close
   rd.read
 end
@@ -61,7 +66,12 @@ def fork_and_capture(&blk)
 end
 
 def fork_and_get_exitstatus(args)
-  pid = Process.spawn("bundle exec bin/foreman #{args}", :out => "/dev/null", :err => "/dev/null")
+  pid = if Foreman.jruby_18? || Foreman.ruby_18?
+    require 'posix/spawn'
+    POSIX::Spawn.spawn({}, "bundle exec bin/foreman #{args}", :out => "/dev/null", :err => "/dev/null")
+  else
+    Process.spawn("bundle exec bin/foreman #{args}", :out => "/dev/null", :err => "/dev/null")
+  end
   Process.wait(pid)
   $?.exitstatus
 end