Adding ability to set ulimit nofiles, increased to 8192 by default for kafka server

Change-Id: I46c767c092a5ad3bee72ddeb6c0f928e8e4a1d08
Merge branch 'debian' into debian-0.8.0

Bringing in ulimit change, will update debian revision
Upping revision to 0.8.0-2 with support for setting ulimit open files

Change-Id: I6b527af3575fa8f24b44ce06cf48466e5ab65ae8
Adding controlled-shutdown command to debian/bin/kafka

Change-Id: Ib7794de2d97d9164879793abf8b877ece15f04dc
Merge branch 'debian' into debian-0.8.0