fix(query): fix the bug that special pseudo column tbname, along with other normal columns in select clause, cause taosd crash.

fix(os): Ubuntu 18.04 timezone error.

enh(tmq): only read committed log

CI: use same way as enterprise edition to run CI

fix:fix warning in smltest.cpp

test: add test case for select topic info

fix(os): Ubuntu timezone error.

test: add test case for topic

test: add privilege test cases

feat(query): add state_count function

fix: commit table in mem and file

fix(sync): display OFFLINE when show vgroups

fix(tmq): show

fix(os): add print trace func.