HYD-6644 Increase the max POST size in nginx
HYD-6644 Increase the max POST size in nginx

Agents can send some pretty large objects in POST operations, larger
than the nginx default (1M) currently allows.

Update the maximum size to allow up to 8M POSTs to match the agent's
limit.

 - update chroma-manager/chroma-manager.conf.template to
   allow POSTs to /agent/message up to 8M

Signed-off-by: Brian J. Murrell <2a8f564cbb80211e19c0a14fed38a451599c042f@intel.com>
Change-Id: Ia614d01f6aa81c0b5ee96d954188abd34618156e
Reviewed-on: http://review.whamcloud.com/23114
Tested-by: Jenkins
Reviewed-by: Joe Grund <5a0004131f5af71cc30270f318d2c30ba7aaa99a@intel.com>
Reviewed-by: Will Johnson <12b9e8082b7fae5ba694976591ab55465e35debd@intel.com>
Tested-by: Chroma Test User
Reviewed-by: Chris Gearing <149a3c4298d99c315fc555357d57d2940923ba5f@intel.com>

intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre