Merge pull request #543 from Roasbeef/group-cache-lru #1464

Job	Run time
test vector check	1m 23s
Sqlc check	30s
Compilation check	37s
Docker build check	4m 18s
Format check	36s
cross compilation	12m 47s
run itests	7m 25s
Lint check	3m 33s
go mod check	33s
RPC check	1m 34s
run unit tests (unit-race)	6m 0s
run unit tests (unit-cover)	4m 36s
run itests postgres	10m 7s
run unit tests (unit dbbackend=postgres)	5m 21s
	59m 20s

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