Improved handling of tools producing unicode in standard error/output.

Without this change (modification on idea by Bjoern), sqlite reports errors as follows for such tools:

ProgrammingError: (ProgrammingError) You must not use 8-bit bytestrings unless you use a text_factory that can interpret 8-bit bytestrings (like text_factory = str). It is highly recommended that you instead just switch your application to Unicode strings. u'UPDATE job SET update_time=?, stdout=?, stderr=? WHERE job.id = ?' ('2013-10-10 05:00:05.789309', '', '/dev/fd/2 unicode \xc3\xaa\xe0\xaf\xb3\xe0\xbe\x85\xe1\x9d\xb1\xe3\x8e\xb0\n', 11).

lib/galaxy/jobs/__init__.py

@@ -25,6 +25,7 @@ from galaxy.jobs.runners import BaseJobRunner
 from galaxy.util.bunch import Bunch
 from galaxy.util.expressions import ExpressionContext
 from galaxy.util.json import from_json_string
+from galaxy.util import unicodify
 from .output_checker import check_output
 
 log = logging.getLogger( __name__ )
@@ -869,6 +870,9 @@ class JobWrapper( object ):
         the output datasets based on stderr and stdout from the command, and
         the contents of the output files.
         """
+        stdout = unicodify( stdout )
+        stderr = unicodify( stderr )
+
         # default post job setup
         self.sa_session.expunge_all()
         job = self.get_job()
@@ -1518,6 +1522,9 @@ class TaskWrapper(JobWrapper):
         the output datasets based on stderr and stdout from the command, and
         the contents of the output files.
         """
+        stdout = unicodify( stdout )
+        stderr = unicodify( stderr )
+
         # This may have ended too soon
         log.debug( 'task %s for job %d ended; exit code: %d'
                  % (self.task_id, self.job_id,