* fix sonar problem in iotdb-cli/src/main/java/org/apache/iotdb/cli/tool/ImportCsv
* Update Readme.md, replace old badge
* fix sonar problem in auth package
* fix sonar problem in auth package
* fix sonar problem of iotdb concurrent package and conf package
* fix sonar problem in db conf and service
* delete reset lock exception in HashLock
* fix code problem in User.java
* fix sonar problem in IoTDBDescriptor
* fix sonar problem in conf and engine package
* add log error info for class BasicAuthorizer
* modify log info for BasicAuthorizer
* fix the log error format
* fix problem about logger and examine whether a string is empty
* logger -> LOGGER
* replace string.isEmpty() with "".equal()