Critical fix for loading BLOB and CLOB files from classpath (valueBlobFile/valueClobFile xml attribute)

Hello, I made a fix for loading BLOB and CLOB files from classpath. Current implementation in the master branch cannot work properly - as soon as the inputstream is loaded, file.length() returns 0 value. JDBC driver denies to write anything to database. 
A new introduced method getFile determines File instance for valueBlobFile value to get correct info about file size.