glusterfsd: Cleanup temporary files from /tmp

For each gluster{d,fs,fsd} start, one or more temporary
file(s) created in /tmp were not being unlinked. This
patch cleans that up.

Modified a typo in an unrelated log message as well.

Change-Id: I3dec2a2ca40c7d6828eb238ec9cd08b6072cf0dd
BUG: 949327
Signed-off-by: Vijay Bellur <vbellur@redhat.com>
Reviewed-on: http://review.gluster.org/4786
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>