TEIIDDES-2214: Fixes issues with CXF war generation

* DefaultWebArchiveBuilderImpl
 * Makes the WEB-INF/wsdl directory prior to files being copied into it.
 * Clean up method warnings, making them private

* VdbResourceFinder
 * Due to xsd resources being split out from model files in the vdb, they
   must also be explicity collected in order to be available for
   searching

* Vdb
 * Convert schema entries to files in the same manner as model files