Skip file download when permission denied error happens

[sakama]

Force to skip retrying when FileException happens while downloading file and message contains Permission Denied.

org.embulk.exec.PartialExecutionException: java.lang.RuntimeException: org.apache.commons.vfs2.FileSystemException: Unknown message with code "Permission denied".
    at org.embulk.exec.BulkLoader$LoaderState.buildPartialExecuteException(org/embulk/exec/BulkLoader.java:363)
    at org.embulk.exec.BulkLoader.doRun(org/embulk/exec/BulkLoader.java:572)
    at org.embulk.exec.BulkLoader.access$000(org/embulk/exec/BulkLoader.java:33)
    at org.embulk.exec.BulkLoader$1.run(org/embulk/exec/BulkLoader.java:374)
    at org.embulk.exec.BulkLoader$1.run(org/embulk/exec/BulkLoader.java:370)
    at org.embulk.spi.Exec.doWith(org/embulk/spi/Exec.java:25)
    at org.embulk.exec.BulkLoader.run(org/embulk/exec/BulkLoader.java:370)
    at org.embulk.EmbulkEmbed.run(org/embulk/EmbulkEmbed.java:180)
    at java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:497)
    at RUBY.run(/Users/satoshi/.embulk/bin/embulk!/embulk/runner.rb:84)
    at RUBY.run(/Users/satoshi/.embulk/bin/embulk!/embulk/command/embulk_run.rb:306)
    at RUBY.<top>(/Users/satoshi/.embulk/bin/embulk!/embulk/command/embulk_main.rb:2)