Tnir fix

[xiangyushawn]

connected to #206

Rework on TNIR

1. Turn TNIR off for Fed Auth
2. Change the TNIR multiplier to 0.125 instead of 0.08
3. Change the time slices to a multiple of 2,4,8 instead of 2,3,4
4. In case the timeout for the first slice is less than 500 ms then bump it up to 500 ms
5. Keep TNIR on if the user has explicitly specified it in the connection string.

[codecov-io]

Codecov Report

Merging #240 into dev will increase coverage by 0.03%.
The diff coverage is 47.05%.

@@             Coverage Diff              @@
##                dev     #240      +/-   ##
============================================
+ Coverage     33.48%   33.51%   +0.03%     
- Complexity     1487     1493       +6     
============================================
  Files            97       97              
  Lines         23390    23404      +14     
  Branches       3840     3846       +6     
============================================
+ Hits           7831     7843      +12     
+ Misses        13998    13995       -3     
- Partials       1561     1566       +5

Flag	Coverage Δ	Complexity Δ
#JDBC41	33.43% <47.05%> (+0.03%)	1487 <0> (+6)	⬆️
#JDBC42	33.37% <47.05%> (-0.02%)	1485 <0> (+3)

Impacted Files	Coverage Δ	Complexity Δ
.../microsoft/sqlserver/jdbc/SQLServerConnection.java	41.23% <47.05%> (+0.13%)	229 <0> (+2)	⬆️
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	36.91% <0%> (-0.18%)	0% <0%> (ø)
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	45.05% <0%> (-0.15%)	183% <0%> (ø)
...m/microsoft/sqlserver/jdbc/SQLServerResultSet.java	24.42% <0%> (+0.41%)	174% <0%> (+4%)	⬆️

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[saurabh500]

LGTM

[xiangyushawn]

@saurabh500 Thank you for your review. I will merge it soon.

[v-nisidh]

connected to #206