sonarQube fixes

[rene-ye]

no functionality changes

[codecov-io]

Codecov Report

Merging #599 into dev will increase coverage by 0.1%.
The diff coverage is 53.48%.

@@             Coverage Diff             @@
##                dev     #599     +/-   ##
===========================================
+ Coverage     46.54%   46.65%   +0.1%     
- Complexity     2218     2221      +3     
===========================================
  Files           108      108             
  Lines         25335    25314     -21     
  Branches       4177     4175      -2     
===========================================
+ Hits          11792    11809     +17     
+ Misses        11514    11475     -39     
- Partials       2029     2030      +1

Flag	Coverage Δ	Complexity Δ
#JDBC41	46.46% <53.48%> (+0.18%)	2213 <0> (+4)	⬆️
#JDBC42	46.49% <53.48%> (+0.1%)	2213 <0> (+4)	⬆️

Impacted Files	Coverage Δ	Complexity Δ
...oft/sqlserver/jdbc/SQLServerResultSetMetaData.java	40.97% <ø> (ø)	23 <0> (ø)	⬇️
...oft/sqlserver/jdbc/SQLServerBulkCSVFileRecord.java	45.92% <ø> (ø)	30 <0> (ø)	⬇️
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	54.06% <0%> (+0.17%)	0 <0> (ø)	⬇️
.../java/com/microsoft/sqlserver/jdbc/SqlVariant.java	88.33% <0%> (ø)	13 <0> (ø)	⬇️
.../microsoft/sqlserver/jdbc/SQLServerDataSource.java	45.98% <100%> (ø)	66 <0> (ø)	⬇️
...c/main/java/com/microsoft/sqlserver/jdbc/Util.java	61.02% <100%> (-0.18%)	87 <0> (-1)
.../com/microsoft/sqlserver/jdbc/SQLServerDriver.java	77% <33.33%> (-0.22%)	25 <0> (ø)
...rc/main/java/com/microsoft/sqlserver/jdbc/DDC.java	45.59% <33.33%> (+2.03%)	105 <0> (+2)	⬆️
...soft/sqlserver/jdbc/SQLServerDatabaseMetaData.java	36.15% <63.63%> (+0.63%)	55 <0> (ø)	⬇️
.../microsoft/sqlserver/jdbc/SQLServerConnection.java	45.77% <71.42%> (ø)	278 <0> (ø)	⬇️
... and 7 more

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