Hotfix/sangshuduo/td 2984 combine taosdemo and taosdemox

[TD-3044]<enhance>: log *check global cfg completed* to grep count st…

[TD-3038]<fix>: fix incorrect disk free size calculation

Hotfix/sangshuduo/td 2984 combine taosdemo and taosdemox

[td-3035] <fix>: fix bug in projections query on super table with fil…

Docs/minor fix

[TD-2841]<test>sql record & replay

[TD-3011]<test>memory leak can't merge

[TD-3031]<fix>: fix NULL parser crash

[TD-2987]auto create table from file crash issue

[TD-2978]stop query when first round with empty result

[TD-2992]<feature>:support between/and in sql

[TD-3019]stddev and group by with same column issue

[TD-2972]remove fetch retry

[TD-2995]change insert result comment

[TD-3004]fix mem leak issue

coverage test/CI: add start time for each case

[TD-2133]<feature>: add queryService in java taosdemo

[TD-2999]<fix>: [http] fix NULL parser crash