ADDED constrained delegation connection sample

[jacobovazquez]

Sample of how to connect with Kerberos constrained delegation using an
impersonated credential

[v-nisidh]

As Timeout timer is missing Exception is in random nature only on Appveyor, trying to close & reopen pull request.

[codecov-io]

Codecov Report

Merging #188 into dev will increase coverage by 1.45%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev     #188      +/-   ##
============================================
+ Coverage     31.43%   32.89%   +1.45%     
- Complexity     1359     1438      +79     
============================================
  Files            97       97              
  Lines         23359    23359              
  Branches       3881     3881              
============================================
+ Hits           7342     7683     +341     
+ Misses        14589    14142     -447     
- Partials       1428     1534     +106

Flag	Coverage Δ	Complexity Δ
#JDBC41	32.76% <ø> (+1.46%)	1427 <ø> (+78)	✅
#JDBC42	32.81% <ø> (+1.43%)	1434 <ø> (+78)	✅

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/microsoft/sql/DateTimeOffset.java	37.14% <0%> (-2.86%)	8% <0%> (-2%)
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	45.09% <0%> (+0.07%)	183% <0%> (-1%)	❌
...m/microsoft/sqlserver/jdbc/SQLServerStatement.java	58.25% <0%> (+0.1%)	128% <0%> (+1%)	✅
...c/main/java/com/microsoft/sqlserver/jdbc/Util.java	39.19% <0%> (+0.23%)	51% <0%> (ø)	❌
...n/java/com/microsoft/sqlserver/jdbc/DataTypes.java	69.02% <0%> (+0.33%)	3% <0%> (+2%)	✅
.../microsoft/sqlserver/jdbc/SQLServerConnection.java	40.19% <0%> (+0.47%)	206% <0%> (+5%)	✅
...ava/com/microsoft/sqlserver/jdbc/SQLCollation.java	92.49% <0%> (+0.48%)	12% <0%> (+1%)	✅
...oft/sqlserver/jdbc/SQLServerPreparedStatement.java	27.53% <0%> (+1.16%)	76% <0%> (+3%)	✅
...a/com/microsoft/sqlserver/jdbc/PLPInputStream.java	34.31% <0%> (+1.18%)	24% <0%> (+1%)	✅
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	36.23% <0%> (+1.31%)	0% <0%> (ø)	❌
... and 9 more

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[Suraiya-Hameed]

Thanks for your contribution @jacobovazquez!