HYD-7311 Bump RPC throttle limit from 5 to 75
HYD-7311 Bump RPC throttle limit from 5 to 75

We are currently throttling RPC calls at 5.
This is causing 502 errors.

Instead, up the limit to 75.
Additionally, ensure we are closing the db connection on potential error.

  - Bump RPC limit to 75.
  - Ensure DB conn is closed.

Change-Id: I8fecf1b5c1883e40a1f6824e176bebd657cf909f
Reviewed-on: https://review.whamcloud.com/26173
Tested-by: Jenkins
Tested-by: Chroma Test User
Reviewed-by: Will Johnson <12b9e8082b7fae5ba694976591ab55465e35debd@intel.com>
Reviewed-by: Joe Grund <5a0004131f5af71cc30270f318d2c30ba7aaa99a@intel.com>

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