Sync oslo log module and its dependencies

Oslo log module has been updated to use oslo.messaging

Closes-bug: #1327076
Change-Id: I031d8f7bf92b6280bda2d2880bfdb4657ef5d3e0
Move mongodb/db2 alarms driver code to alarm tree

This change move the alarms related code of mongodb and db2 driver to
the alarm storage subtree.

Partial implements blueprint dedicated-alarm-database

Change-Id: I9ac0842fdb3cbfc3fd6b9aa76a9ec6df8fee244f
Merge "Move mongodb/db2 alarms driver code to alarm tree"
Merge "Sync oslo log module and its dependencies"