t/attach.t issue on el7

[daldoyle]

At the end of t/attach.t there is a test for trying to upload a file bigger than the max allowed upload size. This works fine on el5 and el6, but on el7 there appears to be some sort of race condition where it works about 50% of the time. It always blocks the file upload, but sometimes you get a 413 response back (what is expected) and sometimes Apache just closes the connection without sending anything at all back.

Need to investigate more to see why. For now I have skipped the tests on EL7 since this is a very uncommon scenario and don't want to block all of el7 support on it.

[daldoyle]

See 593f5cf