remove JNI method for ActiveDirectoryPassword Authentication

[xiangyushawn]

remove JNI method for ActiveDirectoryPassword Authentication, since we no longer use DLL for ActiveDirectoryPassword authentication

[codecov-io]

Codecov Report

Merging #256 into dev will increase coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev     #256      +/-   ##
============================================
+ Coverage     33.77%   33.82%   +0.04%     
- Complexity     1522     1523       +1     
============================================
  Files           101      101              
  Lines         23600    23598       -2     
  Branches       3876     3876              
============================================
+ Hits           7972     7982      +10     
+ Misses        14061    14042      -19     
- Partials       1567     1574       +7

Flag	Coverage Δ	Complexity Δ
#JDBC41	33.66% <ø> (+0.01%)	1510 <ø> (-1)	⬇️
#JDBC42	33.76% <ø> (+0.16%)	1519 <ø> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
...om/microsoft/sqlserver/jdbc/AuthenticationJNI.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...om/microsoft/sqlserver/jdbc/ReaderInputStream.java	44.94% <0%> (-1.13%)	16% <0%> (-1%)
...rc/main/java/com/microsoft/sqlserver/jdbc/DDC.java	27.45% <0%> (-0.67%)	49% <0%> (ø)
...n/java/com/microsoft/sqlserver/jdbc/DataTypes.java	69.69% <0%> (-0.17%)	4% <0%> (-1%)
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	45.05% <0%> (+0.07%)	184% <0%> (+1%)	⬆️
...m/microsoft/sqlserver/jdbc/SQLServerResultSet.java	25.17% <0%> (+0.08%)	179% <0%> (+1%)	⬆️
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	38.29% <0%> (+0.34%)	0% <0%> (ø)	⬇️
...a/com/microsoft/sqlserver/jdbc/PLPInputStream.java	39.05% <0%> (+1.18%)	27% <0%> (+1%)	⬆️

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