executeBatch should prepare statements the same as executeCommand

[AndyCa]

replace generateRawSql with prepare statement

tests pass

haven't been able to run this locally due to difficulties with local maven

[codecov-io]

Codecov Report

Merging #84 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master      #84   +/-   ##
=======================================
  Coverage   81.87%   81.87%           
=======================================
  Files          43       43           
  Lines        1142     1142           
  Branches      103       98    -5     
=======================================
  Hits          935      935           
  Misses        207      207

Impacted Files	Coverage Δ
...lest/src/main/scala/sqlest/executor/Database.scala	66.17% <0%> (ø)	⬆️

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[DavidGregory084]

Thanks @AndyCa, but I think the tests pass because executeBatch does not have any test coverage.

Looking into this I don't think that what we are trying to do is going to work, at least not in this way - see this SO question for more details: https://stackoverflow.com/questions/34041410/batch-preparedstatement-with-different-sql-queries

I suspect if we want to fix the issue you observed with using dates with executeBatch we will probably need to fix the way that generateRawSql formats dates