Update module to use new pymongo (version 3) API

[gst]

See commit 2d4e23e
and :
https://test.savoirfairelinux.com/view/Shinken/job/Shinken-Upstream-Daily-Long-Tests/1961/

Pile d'exécution

  File "/var/lib/jenkins/workspace/Shinken-Upstream-Daily-Long-Tests/test/jenkins/env2.7.6/local/lib/python2.7/site-packages/unittest2/case.py", line 67, in testPartExecutor
    yield
  File "/var/lib/jenkins/workspace/Shinken-Upstream-Daily-Long-Tests/test/jenkins/env2.7.6/local/lib/python2.7/site-packages/unittest2/case.py", line 597, in run
    self.setUp()
  File "/var/lib/jenkins/workspace/Shinken-Upstream-Daily-Long-Tests/test/tmp/mod-logstore-mongodb/test/test_livestatus_mongodb.py", line 254, in setUp
    self.init_livestatus(dbmodconf=dbmodconf)
  File "/var/lib/jenkins/workspace/Shinken-Upstream-Daily-Long-Tests/test/shinken_modules.py", line 126, in init_livestatus
    self.livestatus_broker.db.open()
  File "modules/logstore-mongodb/module.py", line 175, in open
    raise LiveStatusLogStoreError(err)
"'module' object has no attribute 'Connection'

[GuusH]

Hi,

I ran into the same thing, but hit the other mongo module first. See shinken-monitoring/mod-retention-mongodb#8
I've made a fix for the issue in a fork of that module and I'm currently testing with pymongo 2.6.2 and 3.0.1. So far so good. The fix is fairly minimal. I'll apply the same logic to this module and see if I can get this to work with 2.x and 3.x version of pymongo.

To be continued!

[GuusH]

See #11