Typos in SQLServerConnectionPoolProxy

[marschall]

There are a few easy to fix typos in SQLServerConnectionPoolProxy.

[marschall]

The AppVeyor builds fail because of

org.opentest4j.AssertionFailedError: Timeout timer is missing.

while the Travis builds succeed. I don't think this is caused by Javadoc changes.

[codecov-io]

Codecov Report

Merging #189 into dev will decrease coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev     #189      +/-   ##
============================================
- Coverage     31.43%   31.38%   -0.05%     
+ Complexity     1359     1353       -6     
============================================
  Files            97       97              
  Lines         23359    23359              
  Branches       3881     3881              
============================================
- Hits           7342     7332      -10     
- Misses        14589    14599      +10     
  Partials       1428     1428

Flag	Coverage Δ	Complexity Δ
#JDBC41	31.29% <ø> (-0.01%)	1346 <ø> (-3)
#JDBC42	31.33% <ø> (-0.04%)	1353 <ø> (-3)

Impacted Files	Coverage Δ	Complexity Δ
...t/sqlserver/jdbc/SQLServerConnectionPoolProxy.java	12.62% <ø> (ø)	12 <0> (ø)	❌
src/main/java/microsoft/sql/DateTimeOffset.java	37.14% <0%> (-2.86%)	8% <0%> (-2%)
...m/microsoft/sqlserver/jdbc/SQLServerResultSet.java	20.95% <0%> (-0.29%)	154% <0%> (-2%)
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	44.8% <0%> (-0.22%)	182% <0%> (-2%)
...rc/main/java/com/microsoft/sqlserver/jdbc/DDC.java	24.1% <0%> (+0.44%)	36% <0%> (ø)	❌

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