mvn jetty:run causes TransformerConfigurationException with “Failed to compile stylesheet. xx errors...."

[simonp]

Problem is that mvn jetty:run (as used by devs) adds current schema plugin config to the schemaplugin-uri-catalog.xml in src/webapp/WEB-INF/data/config (thanks to fxp for that diagnosis) - this would cause all installations built from this src tree to fail.

Fix is to reconfig the schemaplugin-uri-catalog.xml (for urls needed by XSLT engine) at startup with the installed schema plugins (this is done in SchemaManager init) - benefit is that installation can now be moved without causing issues here as well.

See commit a3131b7d850ddb887c720749ced1541d02708d51