support for exporting selected parts of hardware database into an sqlite database

[andreh12]

The code here is one of the solutions to #99. It allows to export selected dpset paths to a sqlite file and configure DAQAggregator.properties to read the hardware database from such an sqlite file.

Note that it was necessary to catch and rewrite one SQL query done by the RCMS code when reading the hardware database because this SQL query uses a vendor specific extension which is not understood by sqlite. The replacement query (see 356152d) is currently not 100% equivalent but internal discussions indicate that the database content is nowadays such that the difference does not matter.

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The pull request includes a standalone application which extracts a list of given paths to an sqlite file. This can be built and run as follows:

• run mvn assembly:assembly -DskipTests
• remove the output file to avoid adding database content to it if exists already
• run

java \
-cp target/DAQAggregator-1.17.6-jar-with-dependencies.jar \
rcms.utilities.daqaggregator.datasource.HwdbToSqlite
<dpsetpath1> \
<dpsetpath2> \
...
<outputfile.sqlite>

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To configure the DAQAggregator to use this file, comment out the existing hwcfgdb.type fields in DAQAggregator.properties and add the following two lines:

hwcfgdb.type = SQLITE
hwcfgdb.dburl = jdbc:sqlite:/path/to/sqlite/file.sqlite

(note that when running the conversion program above you should ensure that DAQAggregator.properties is configured to use the original database to read from).

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Doing both of the above steps, FlashlistDispatcherIT successfully runs from an sqlite file if one copies the appropriate dpset paths (some of which seem to be taken from the current configuration which is running online).