Toss ignored errors returned from Riemann connection phase

[herbenderbler]

No description provided.

[amir]

Thanks. It's a small thing but err is re-used a couple of lines after the Dial() to store the result of Send() as well—it's ignored there too though. At the current state of this patch I get undefined: err compilation error for lines 173 and 195 of raidman_test.go. Care to toss them out as well?