TD-2652<fix>: tsim may crash after the script is executed successfully

TD-2640

[TD-2660]<fix>:taosd crash when queried block has only one NULL record	

[TBASE-1555]<fix>: replica shall be not greater than #dnodes

[TD-2647]<fix>: fix batch create table retry processing

[TD-2658]<fix> memory overflow

Feature/td 2200

Feature/td 2191

change version number

[TD-2655]<fix>: fix TSDB_CODE_RPC_INVALID_VERSION returning to app

[TD-2648]<fix>: enlarge dnode peer sessions from 2K to 32K

[TECO-40] <docs>: add video link to documentation markdown, move vide…

[TD-2631]last_row/interval can't be mixed up

[TD-2607] add test case

fix lowa test failure

TD-2642

[TD-2354]<test>: add test case for cache last_row

[TD-2644]<fix>: process batch create table sub messages in mnodeVgrou…