Update Samples to be usable with Eclipse directly

[cheenamalhotra]

Updating Sample files to be able to add to Build Path and use directly in Eclipse.
Makes it easy to manage sample source code to test with driver changes and upcoming JDKs.
Also updated driver version used to 6.4.0.jre9

[codecov-io]

Codecov Report

Merging #679 into dev will increase coverage by 0.08%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev     #679      +/-   ##
============================================
+ Coverage     48.06%   48.14%   +0.08%     
- Complexity     2571     2578       +7     
============================================
  Files           112      113       +1     
  Lines         26582    26587       +5     
  Branches       4436     4436              
============================================
+ Hits          12777    12801      +24     
+ Misses        11667    11652      -15     
+ Partials       2138     2134       -4

Flag	Coverage Δ	Complexity Δ
#JDBC42	48.03% <ø> (?)	2576 <ø> (?)
#JDBC43	48.05% <ø> (-0.01%)	2571 <ø> (ø)

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/com/microsoft/sqlserver/jdbc/Util.java	60.91% <0%> (-0.22%)	88% <0%> (-1%)
...rc/main/java/com/microsoft/sqlserver/jdbc/dtv.java	63.29% <0%> (-0.19%)	0% <0%> (ø)
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	54.53% <0%> (-0.1%)	0% <0%> (ø)
.../com/microsoft/sqlserver/jdbc/SQLServerJdbc42.java	40% <0%> (ø)	0% <0%> (?)
...n/java/com/microsoft/sqlserver/jdbc/DataTypes.java	78.01% <0%> (+0.16%)	5% <0%> (+1%)	⬆️
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	52.67% <0%> (+0.19%)	240% <0%> (+1%)	⬆️
...oft/sqlserver/jdbc/SQLServerPreparedStatement.java	50.85% <0%> (+0.24%)	157% <0%> (ø)	⬇️
.../microsoft/sqlserver/jdbc/SQLServerDataSource.java	45.66% <0%> (+0.26%)	66% <0%> (ø)	⬇️
.../com/microsoft/sqlserver/jdbc/SQLServerDriver.java	76.85% <0%> (+0.27%)	25% <0%> (ø)	⬇️
...m/microsoft/sqlserver/jdbc/SQLServerResultSet.java	33.14% <0%> (+0.43%)	245% <0%> (+4%)	⬆️
... and 3 more

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