mongodb repository and missing dev packages fix

[cyberorg]

With this change the image almost finishes the build.

Initialize scrip fails at this step:

python manage.py sync_existing_documents

Traceback (most recent call last):
File "manage.py", line 10, in
execute_from_command_line(sys.argv)
File "/usr/lib/python2.7/dist-packages/django/core/management/init.py", line 399, in execute_from_command_line
utility.execute()
File "/usr/lib/python2.7/dist-packages/django/core/management/init.py", line 392, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv
self.execute(*args, **options.dict)
File "/usr/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
output = self.handle(*args, **options)
File "/home/docker/code/gstudio/gnowsys-ndf/gnowsys_ndf/ndf/management/commands/sync_existing_documents.py", line 36, in handle
if counter_objs['nModified']:
KeyError: 'nModified'

Please test the process and let me know if you are able to complete the build.