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]

Codecov Report

❗ 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

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