Combine DB container tests into single module, and improve error handling/display#243

Merged

rnorth merged 6 commits intomasterfrom reduce-error-output

Nov 19, 2016

+613-601

Commits on Nov 19, 2016

Extract all database container tests into a common module to allow for refactoring of common elements.
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Add support for automatically extracting files from class path JARs to enable them to be volume mounted into containers.
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Add fully functional cleanup code to remove temporary copies of classpath resources that have been extracted from JAR files.
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Address review comments (from #242 and #243 )
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Reduce false erroneous output:
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Increase database connection timeout for slightly better reliability when DB containers are slow to start
rnorth
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