Revert "Close connection before and after executing periodic OCR task, to avoid stale DB connection remaining open. Ref: Issue #4"

This reverts commit ee1e732776.

73ebc06275 Supersedes this one, thanks a lot to Mathias Behrle for uncovering this bug and all the help squashing it!

apps/ocr/tasks.py

@@ -5,7 +5,6 @@ import platform
 import logging
 
 from django.db.models import Q
-from django import db
 
 from job_processor.api import process_job
 from lock_manager import Lock, LockError
@@ -49,8 +48,6 @@ def task_process_queue_document(queue_document_id):
 
 
 def task_process_document_queues():
-    # Make sure this task get a fresh connection to the database
-    db.close_connection()
     logger.debug('executed')
     # TODO: reset_orphans()
     q_pending = Q(state=QUEUEDOCUMENT_STATE_PENDING)
@@ -77,6 +74,3 @@ def task_process_document_queues():
             logger.debug('already processing maximum')
     else:
         logger.debug('nothing to process')
-
-    # Close the database explicitly or else Django keeps it open
-    db.close_connection()