Add SQLServerMetadata constructor to set precision for string types

[lilgreenbird]

fixes issue #846

[codecov-io]

Codecov Report

Merging #876 into dev will decrease coverage by 0.13%.
The diff coverage is 0%.

@@             Coverage Diff             @@
##                dev    #876      +/-   ##
===========================================
- Coverage     48.74%   48.6%   -0.14%     
+ Complexity     2813    2810       -3     
===========================================
  Files           118     118              
  Lines         27863   27877      +14     
  Branches       4637    4642       +5     
===========================================
- Hits          13582   13551      -31     
- Misses        12086   12134      +48     
+ Partials       2195    2192       -3

Flag	Coverage Δ	Complexity Δ
#JDBC42	48.18% <0%> (ø)	2770 <0> (+6)	⬆️
#JDBC43	48.55% <0%> (-0.09%)	2807 <0> (-2)

Impacted Files	Coverage Δ	Complexity Δ
...om/microsoft/sqlserver/jdbc/SQLServerMetaData.java	21.81% <0%> (-2.19%)	0 <0> (ø)
...om/microsoft/sqlserver/jdbc/ReaderInputStream.java	40.65% <0%> (-6.6%)	13% <0%> (-2%)
...rc/main/java/com/microsoft/sqlserver/jdbc/DDC.java	44.68% <0%> (-1.71%)	108% <0%> (ø)
...m/microsoft/sqlserver/jdbc/SQLServerException.java	75.93% <0%> (-1.51%)	30% <0%> (-1%)
...a/com/microsoft/sqlserver/jdbc/PLPInputStream.java	58.33% <0%> (-1.2%)	33% <0%> (-1%)
...n/java/com/microsoft/sqlserver/jdbc/Parameter.java	63.52% <0%> (-0.61%)	64% <0%> (ø)
...m/microsoft/sqlserver/jdbc/SQLServerResultSet.java	32.74% <0%> (-0.3%)	256% <0%> (-3%)
...rc/main/java/com/microsoft/sqlserver/jdbc/dtv.java	62.33% <0%> (-0.24%)	0% <0%> (ø)
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	55.72% <0%> (-0.22%)	0% <0%> (ø)
...oft/sqlserver/jdbc/SQLServerPreparedStatement.java	51.77% <0%> (-0.2%)	212% <0%> (ø)
... and 3 more

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