Can't import feature to an array design which has metadata about number of features in a file

[Nicklas Nordborg]

1. Create an array design and select a platform which has a metadata extractor, for example the Illumina package from ​http://baseplugins.thep.lu.se/wiki/net.sf.basedb.illumina

2. Attach a BGX file to the array design. The metadata extractor will add information about the number of probes in the file: Features yes (db: 0; file: 731)

3. Use the import button and enter parameters for the import plug-in.

4. The plug-in will stop with the following error message: Permission denied: Features has already been added to New array design

Stack trace:

net.sf.basedb.core.PermissionDeniedException: Permission denied: Features has already been added to New array design
at net.sf.basedb.core.ArrayDesign.getFeatureBatcher(ArrayDesign.java:711)
at net.sf.basedb.plugins.ReporterMapFlatFileImporter.begin(ReporterMapFlatFileImporter.java:522)
at net.sf.basedb.plugins.AbstractFlatFileImporter.doImport(AbstractFlatFileImporter.java:511)
at net.sf.basedb.plugins.AbstractFlatFileImporter.run(AbstractFlatFileImporter.java:441)
at net.sf.basedb.core.PluginExecutionRequest.invoke(PluginExecutionRequest.java:108)
at net.sf.basedb.core.InternalJobQueue$JobRunner.run(InternalJobQueue.java:487)
at java.lang.Thread.run(Thread.java:619)

If no BGX file is selected in step 2 the import works.

[Nicklas Nordborg]

(In [4138]) Fixes #928