Ceph-nvmeof

https://github.com/ceph/ceph-nvmeof/pull/851 - Append group name to subsystem NQN - fix issue #851
https://github.com/ceph/ceph-nvmeof/pull/847 - Do not display info messages when json format is used
https://github.com/ceph/ceph-nvmeof/pull/845 - Handle empty log_level values as if there was no value set fix issue #845
https://github.com/ceph/ceph-nvmeof/pull/841 - Revert SPDK RPC fields - fix issue #841
https://github.com/ceph/ceph-nvmeof/pull/838 - Display an error in case operation was longer than OMAP lock duration - fix issue #838

Fix 346 listeners enable-ha state is lost when the gateway restarts
Fix 253 Use enum and not string for some GRPC fields
Fix 340 get_subsystems fails with "namespace" has no field named "anagrpid"
Fix 335 Make port parameter not required for create and delete listener CLI commands
Fix 332 Add a get_gateway_info CLI command
Fix 327 Fix OMAP lock test
Fix 284 create_subsystem should fail if --enable-ha=true, and --ana-reporting=false

set update logs of state.py to debug. PR 1146
control/cluster.py: rename conf parameter cluster_pool_size -> cluster_connections. PR 1129
Do not try to use None context in get_subsystems(). Fixes 1115
Allow setting max subsystems limit in SPDK. Fixes 1103
Add some flake8 info to readme file. PR 1112
Display warnings from CLI and gateway about rounding or truncating QOS limits. Fixes 1047

set update logs of state.py to debug. PR 1146
control/cluster.py: rename conf parameter cluster_pool_size -> cluster_connections. PR 1129
Do not try to use None context in get_subsystems(). Fixes 1115
Allow setting max subsystems limit in SPDK. Fixes 1103
Add some flake8 info to readme file. PR 1112
Display warnings from CLI and gateway about rounding or truncating QOS limits. Fixes 1047

Re-arrange SPDK commits for QOS set. 1107
Do not send QoS messages is we're still busy processing the previous ones. Fixes 1104
Update vstart-cluster to version 19.2.1. Fixes 1098
server.py: remove '<pool>.<group>' from metadata id 1080
Ignore dashes when comparing UUID values for namespace. Fixes 1077
Display error message if deleting non-existing host or listener. Fixes 1066 Fixes 1070
Add max_hosts limit and change per subsystem default to 128 Fixes 1071
Verify IP addresses passed as CLI parameters. Fixes 1068
Verify listener IP address before calling SPDK. Fixes 1065
Don't delete other subsys namespace when deleting subsys. Fixes 1063
Encrypt keys before saving in OMAP file Fixes 960
update readme for CentOS users 1057
workflows: upload spdk docker image into [quay.io](http://quay.io/) #1045
Get SPDK version from SPDK and not the environment. Fixes 1049
Issue a warning when user asks for open host access. Fixes 1050
Adjust demo make target for multi-gateway environment Fixes 1051
workflows: upload spdk docker image into [quay.io](http://quay.io/) when release is created. PR #1045
Allow adding listeners with hostname mismatch. Fixes 1028
Enable setting of SPDK iobuf options. Fixes 1038
Trash RBD image on namespace deletion. Fixes 953
fix rebalance deadlock. PR 1024
Allow listing namespaces for all subsystems. Fixes 943
Do not append group name to subsys NQN twice. Fixes 1017
Add a CLI command to show SPDK ANA states. Fixes 973

Validate DHCHAP and PSK keys in the gateway PR 1013
Add logs for starting rebalance thread PR 1007
Validate DHCHAP and PSK keys in the gateway. Fixes 1004
Verify python source files with flake. PR 1011
Add debug logs to rebalance PR 993
Use "unset" instead of "unlimited" for QOS limits PR1003
Add a command to change namespace visibility PR 1001
README.md: no huge info PR 988
Do not display an exception in case we delete a non-existing namespace host PR 997
Do not process gRPC calls when gateway is going down. Fixes 992
add debug logs to rebalance PR 993
fix exception handling in rebalane thread PR 989
fix rebalance logs PR 983
makefile: improve build, retry for Shaman URL PR 981
fix tests: 4gw_create-delete PR 980
New rebalance PR 909