Get local host name before opening TDSChannel

[Suraiya-Hameed]

Fixes #177

[codecov-io]

Codecov Report

Merging #324 into RTW_6.2.0 will decrease coverage by 0.01%.
The diff coverage is 75%.

@@               Coverage Diff               @@
##             RTW_6.2.0     #324      +/-   ##
===============================================
- Coverage        37.17%   37.15%   -0.02%     
+ Complexity        1670     1666       -4     
===============================================
  Files              103      103              
  Lines            23663    23664       +1     
  Branches          3918     3918              
===============================================
- Hits              8796     8793       -3     
  Misses           13278    13278              
- Partials          1589     1593       +4

Flag	Coverage Δ	Complexity Δ
#JDBC41	36.98% <75%> (-0.06%)	1655 <0> (-9)
#JDBC42	37.03% <75%> (-0.02%)	1660 <0> (ø)

Impacted Files	Coverage Δ	Complexity Δ
.../microsoft/sqlserver/jdbc/SQLServerConnection.java	43.17% <75%> (+0.02%)	252 <0> (ø)	⬇️
src/main/java/microsoft/sql/DateTimeOffset.java	37.14% <0%> (-2.86%)	8% <0%> (-2%)
...om/microsoft/sqlserver/jdbc/SimpleInputStream.java	47.4% <0%> (-1.49%)	9% <0%> (-1%)
...rc/main/java/com/microsoft/sqlserver/jdbc/DDC.java	29.43% <0%> (-0.68%)	56% <0%> (ø)
...oft/sqlserver/jdbc/SQLServerPreparedStatement.java	33.45% <0%> (-0.18%)	89% <0%> (-1%)
...om/microsoft/sqlserver/jdbc/ReaderInputStream.java	46.06% <0%> (ø)	17% <0%> (ø)	⬇️
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	45.98% <0%> (+0.1%)	0% <0%> (ø)	⬇️
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	48.93% <0%> (+0.14%)	210% <0%> (ø)	⬇️

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[v-nisidh]

Suggestion: I think it should be good if we mention that in Sierra getLocalHost takes lot of time.

[v-nisidh]

Suggestion: As you are moving condition we can reduce complexity by 1 by using StringUtils.isEmpty()