move sonar changes from apache-incubator

[kr11]

Copy all files in apache/incubator-iotdb except .git into thulab/iotdb. the file modification is twofold:

1. code changes for improving code quality by sonar.
2. File changes for code style format (and others?)

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@93727d8). Click here to learn what that means. The diff coverage is 31.62%.

@@            Coverage Diff            @@
##             master     #591   +/-   ##
=========================================
  Coverage          ?   38.17%           
=========================================
  Files             ?      363           
  Lines             ?    33032           
  Branches          ?     6205           
=========================================
  Hits              ?    12611           
  Misses            ?    19077           
  Partials          ?     1344

Impacted Files	Coverage Δ
...main/java/org/apache/iotdb/db/metadata/MGraph.java	27.33% <ø> (ø)
...exception/codebased/ConnectionFailedException.java	0% <ø> (ø)
...pache/iotdb/db/qp/logical/crud/UpdateOperator.java	0% <ø> (ø)
...ava/org/apache/iotdb/cli/tool/AbstractCsvTool.java	0% <ø> (ø)
.../engine/querycontext/OverflowSeriesDataSource.java	0% <ø> (ø)
...b/db/qp/strategy/optimizer/DnfFilterOptimizer.java	41.66% <ø> (ø)
...apache/iotdb/db/qp/logical/crud/QueryOperator.java	100% <ø> (ø)
.../main/java/org/apache/iotdb/db/metadata/MTree.java	39.75% <ø> (ø)
...in/java/org/apache/iotdb/db/metadata/Metadata.java	0% <ø> (ø)
...g/apache/iotdb/db/qp/physical/crud/UpdatePlan.java	45.83% <ø> (ø)
... and 148 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 93727d8...505787e. Read the comment docs.