ioc: fix dbLoadGroups command. #820

Job	Run time
Linux CentOS 7	3m 36s
Linux fedora latest	4m 46s
Native Linux (WError)	6m 3s
Native Linux (libc++ debug)	5m 44s
Native Linux (c++17)	4m 47s
Cross mingw64 DLL	10m 21s
Cross mingw64 static	12m 4s
RTEMS5	14m 29s
Native Linux with clang	5m 5s
Native Linux with clang ubsan	5m 2s
Native Linux with libevent stable	4m 38s
Native Linux with 7.0.2	5m 10s
Native Linux with 3.15	4m 15s
Native Linux with 3.14	6m 8s
OSX	4m 7s
vs2019 DLL	7m 54s
vs2019 static	8m 22s
	1h 52m 31s

Provide feedback