test: fix tsim/db/error1.sim random failed

use wrong usedb map

fix:[TS-3347]set ver to first version if version stored is smaller th…

fix: fix taosd not exit when press ctrl+c

refactor: do some internal refactor.

fix:[TS-3347]set ver to first version if version stored is smaller than first version in wal when subscribe db

fix: clear null bitmap bit when set value

[TS-3140]: add test case for user privilege

fix:[TS-3303]use stable name + child table name as key to save uid to…

fix:change field bytes if length is bigger than 1024

fix:[TS-3277]table not exist if drop stable in another client when in…

fix: print float with 20 width limit

int16 overflow

enh: declare mndSplitVgroup in mndVgroup.h