limit ci branch.

change some log

[add init]

fix two stream cases

add test cases for join queries

Hotfix/ref count

Feature/sangshuduo/make pytest auto find so

fix coverity's bug

Hotfix/test

* develop: (138 commits)
  [td-225]fix error in global variables.
  [td-225]fix error in global variables.
  [td-225] fix invalid read
  [td-688]
  [td-225] update the error code info
  [td-225] update the error code info
  [td-225] update the error code when system related error happens.
  Fix bug occured in regression test
  fix compile error in arm64
  [TD-543] fix coverity scans
  reference count
  Bump jackson-databind in /tests/comparisonTest/opentsdb/opentsdbtest
  [TD-543] coverity scan
  [td-225] add cancel query support, fix bugs in load file blocks when column has already been updated.
  implement format check for log
  change SIGINT to SIGKILL to make dnode5 be killed.
  scripts
  add comments
  free ID in the last step
  dont reset lockedBy
  ...

[td-225] update the error code when system related error happens.