[TD-2342]<test>: add test case

[TD-2292]<fix> multi exec taos_query when fail

[TD-2310]<feature>: add dest table into show streams

Feature/wal

[TD-2366]<fix>: is (not) null for binary/nchar

[TD-2274]<fix>: make ep inconsistent log message more clear

[TD-2328]<test>add test case for MaxSQLLen

[TD-2356]<test>add new Jenkinsfile

[TD-2363]<fix>: Super Table hash is emptied abnormally, resulting in data query failure

[TD-2114]<test>: Improve performance test script

Hotfix/td 2364

[TD-2371]<enhance>:Record important information to a separate log file called taoinfo

[TD-2370]<fix>: fix the deadlock when the system exits